995-1Description
995-1.1General: This Section governs the requirements for all permanent traffic control
signals and devices . All equipment shall be permanently marked with manufacturer name or trademark, part number, and date of manufacture or serial number.
995-1.2Product Acceptance: All specified products shall be items listed on the
Department’s Approved Product List (APL), unless otherwise noted below. Manufacturers seeking evaluation of products for inclusion on the APL shall submit an application in accordance with Section 6 and include the following documentation. A separate application must be submitted for each product to be evaluated, showing that the product mee ts the applicable requirements.
Table 995-1 Documentation Requirements Assembly and Installation Instructions Include any surface preparations, assembly/installation instructions, operation manual, troubleshooting guides, and repair procedures. Independent Laboratory Test Results Product meets requirements of this Section. Product Label Photo Labeling shows the manufacturer’s name, trademark, and product model number/name. Label shows the date of manufacture and/or the manufacturer’s batch number. Additional label requirements, as listed within this Section. Product Photo Displays the significant features of the product as required in this section. Compliance Matrix Include completed compliance matrix at https://www.fdot.gov/traffic/traf -sys/product - specifications.shtm Manufacturer’s Product Specifications Include product specifications showing electrica l requirements, voltages, etc. Product Drawings or Cut Sheet Show mounting points, mechanical details, block diagrams, schematics, etc. Parts List List major parts and field serviceable components.
995-1.3Abbreviations: The following abbreviations are used in this Section:
Acrylonitrile Butadiene Styrene (ABS) Alternating Current (AC) Direct Current (DC) Electronic Industries Alliance (EIA) Global Positioning System (GPS) Hypertext Transfer Protocol (HTTP) Institute of Transportation Engineers (ITE) Internet Protocol (IP) 1201 FY 2023-24 Return to Table of Contents Local Area Network (LAN) Network Time Protocol (NTP) Telecommunications Industry Association (TIA) Uniform Code Flash (UCF) Uniform Resource Locator (URL) Ultraviolet (UV)
995-2Vehicle Detection Systems
995-2.1General: All parts shall be constructed of corrosion -resistant materials, such as
UV stabilized or UV resistant plastic, stainless steel, anodized aluminum, brass, or gold -plated metal. All fasteners exposed to the el ements shall be Type 304 or 316 passivated stainless steel. If the assembly includes a cabinet, meet the requirements of Section 676. Detectors shall meet the environmental requirements of NEMA TS-2-2021.
995-2.2Inductive Loop Detector Units: Rack mount inductive loop detector units shall
meet the requirements of NEMA TS-2-2021. Shelf mount detector units shall meet the requirements of NEMA TS-1-1989.
995-2.3Video Vehicle Detection System (VVDS) :
995-2.3.1 Configuration and Management : The VVDS shall be provided with software that allows local and remote configuration and monitoring. The system shall be capable of displaying detection zones and detection activations overlaid on live video inputs. The VVDS shall meet the following criteria:
including size, placement, and sensitivity of detection zones.
configuration data shall be capable of beings aved to a computer and restored from a saved file. All communication addresses shall be user programmable.
development kit available to the Department at no cost for integration with third party software and systems. 995-2.3.2 Detection Camera: Camera shall be recommended by the video detection system manufacturer. Cameras that are integrated and included in a VVDS shall be compliant with the Code of Federal Regulations Section 200.216 Prohibition on certain telecommunications and video surveillance services or equipment https://www.ecfr. gov/current/title -2/subtitle-A/chapter -II/part-200/subpart -C/section -200.216. 995-2.3.3 Machine Vision Processor: The VVDS shall include a machine vision processor that allows video analysis, presence detection, data co llection, and interfaces for inputs and outputs as well as storage and reporting of collected vehicle detection data. 995-2.3.4 Communications: The VVDS shall include a minimum of one serial or Ethernet communications interface and shall meet the followi ng criteria.
Ensure that the serial ports support data rates up to 115200 bps; error detection utilizing parity bits (i.e., none, even, and odd); and stop bits (1 or 2).
Verify that all unshielded twisted pair/shielded twisted pair network cables and connectors comply with TIA-568.
Federal Communications Commission (FCC) certified. The FCC identification number shall be 1202 FY 2023-24 Return to Table of Contents displayed on an external label and all detection system devices shall operate within their FCC frequency allocation.
carrier used by the agency responsible for system operation and maintenance.
communications interface. 995-2.3.5 Video Inputs and Outputs: Analog video inputs and o utputs shall utilize BNC connectors. 995-2.3.6 Solid State Detection Outputs: Outputs shall meet the requirements of NEMA TS2-2021, 6.5.2.26. 995-2.3.7 Electrical Requirements: The system shall operate using a nominal input voltage of 120 V of alternating current (V AC) and with an input voltage ranging from 89 to 135 VAC. If a system device requires operating voltages other than 120 VAC, a voltage converter shall be supplied.
995-2.4Microwave Vehicle Detection System (MVDS): Sidefire MVDS sensors shal l
have a minimum 200 -foot range and the capability to detect a minimum of 8 lanes of traffic. 995-2.4.1 Configuration and Management: The MVDS shall be provided with software that allows local and remote configuration and monitoring. The system software shall be capable of displaying detection zones and detection activations in a graphical format. The MVDS shall meet the following criteria:
including size, placement, and sensitivity of detection zones.
detection system configuration data can be saved to a computer and restored from a saved file. Ensure that all communication addresses are user programmable.
development kit available to the Department at no cost for integration with third party software and systems. 995-2.4.2 Communications: Major components of the detection system (such as the sensor a nd any separate hardware used for contact closures) shall include a minimum of one serial or Ethernet communications interface and shall meet the following criteria:
the serial ports support data rates up to 115200 bps; error detection utilizing parity bits (i.e., none, even, and odd); and stop bits (1 or 2).
that all unshielded twisted pair/shielded twisted pair network cables and connectors comply with TIA-568.
certified. The FCC identification number is displayed on an external label and all detection system devices operate within t heir FCC frequency allocation.
carrier used by the agency responsible for system operation and maintenance.
communications interface.
with the Code of Federal Regulations Section 200.216 Prohibition on certain telecommunications 1203 FY 2023-24 Return to Table of Contents and video surveillance services or equipment https://www.ecfr.gov/current/title -2/subtitle- A/chapter -II/part-200/subpart -C/section -200.216. 995-2.4.3 Solid State Detection Outputs: Outputs shall meet the requirements of NEMA TS2-2021, 6.5.2.26. 995-2.4.4 Electrical Requirements: The microwave detector shall operate with a nominal input voltage of 12 VDC and with an input voltage ranging from 89 to 135 VAC. If any system device requires operating voltages other than 120 VAC, a voltage converter shall be supplied. The detector shall be FCC certified and has been granted authorization to operate within a frequency range established and approved by the FCC. The FCC identification number shall be displayed on an external label.
995-2.5Wireless Magnetometer Detection System (WMDS):
995-2.5.1 Configuration and Management: The detection system shall be provided with software that allows local and remote configuratio n and monitoring and shall meet the following criteria.
system configuration data can be saved to a computer and restored from a saved file. All communication addresses shall be user programmable.
development kit available to the Department at no cost for integration with third party software and systems. 995-2.5.2 Communications: Components of the detection system (such as sensors, access points, and contact closure cards) shall include a minimum of one serial or Ethernet communications interface and shall meet the following criteria.
the serial ports support data rates up to 115200 bps; error detection utilizing parity bits (i.e., none, even, and odd); and stop bits (1 or 2).
unshielded twisted pair/shielded twisted pair network cables and connectors comply with TIA-568.
certified. The FCC identification number is displayed on an external label and all detection system devices operate within their FCC frequency allocation.
carrier used by the agency responsible for system operation and maintenance.
communications interface. 995-2.5.3 Solid State Detection Outputs: Outputs shall meet the requirements of NEMA TS2-2021, 6.5.2.26. 995-2.5.4 Electrical Requirements: The WDMS shall operate with a n input voltage ranging from 89 to 135 VAC. If any system device requires operating voltages other than 120 VAC, a voltage converter shall be supplied.
995-2.6Automatic Vehicle Identification (AVI):
995-2.6.1 Configuration and Management: The detection system shall be provided with software that allows local and remote configuration and monitoring. 1204FY 2023-24Return to Table of Contents
995-2.6.2 Communications: Components of the detection system (such as
sensors, controllers, and processing hardware) shall include a minimum of one serial or Ethernet
communications interface and shall meet the following criteria.
the serial ports support data rates up to 115200 bps; error detection utilizing parity bits (i.e.,
none, even, and odd); and stop bits (1 or 2).
unshielded twisted pair/shielded twisted pair network cables and connectors comply with
TIA-568.
certified. The FCC identification number is displayed on an external label and all detection
system devices operate within their FCC frequency allocation.
carrier used by the agency responsible for system operation and maintenance.
communications interface.
995-2.6.3 Probe Data Detector Requirements:
Allegro and the protocol defined in ISO18000-6B.
power.
visible supplemental lighting.
995-2.6.4 Electrical Requirements: The AVI shall operate with an input voltage
ranging from 89 to 135 VAC. If any system device requires operating voltages other than
120 VAC, a voltage converter shall be supplied. For solar powered devices, the detection system
must operate for 5 days without solar assistance.
995-2.7Wrong Way Vehicle Detection Systems (WWVDS):
995-2.7.1 Configuration and Management: The WWVDS shall be provided
with software that allows local and remote configuration and monitoring. That the system shall
have the capability to display detection zones and detection activations. The WWVDS shall meet
the following criteria:
clock/calendar with on-board battery backup, or the controller’s internal time clock can be
configured to synchronize to a time server using the network time protocol (NTP) in order to
maintain the current local date/time information. For NTP, the synchronization frequency must
be user configurable and permit polling intervals from once per minute to once per week in one-
minute increments. For NTP, the controller must allow the user to define the NTP server by IP
address.
including size, placement, and sensitivity of detection zones.
configuration data shall be capable of being saved to a computer and restored from a saved file.
All communication addresses shall be user programmable. 1205FY 2023-24Return to Table of Contents
development kit available to the Department at no cost for integration with third party software
and systems.
995-2.7.2 Communications: Major components of the WWVDS (such as the
sensor and any separate hardware used for contact closures) shall include a minimum of one
serial or Ethernet communications interface and shall meet the following criteria:
standards and the serial ports support data rates up to 115200 bps; error detection utilizing parity
bits (i.e., none, even, and odd); and stop bits (1 or 2).
10/100 Base TX connection. Verify that all unshielded twisted pair/shielded twisted pair network
cables and connectors comply with TIA-568.
are FCC certified. The FCC identification number is displayed on an external label and all
WWVDS devices operate within their FCC frequency allocation.
cellular carrier used by the agency responsible for system operation and maintenance.
communications interface.
software. The SunGuide software requirements are listed in supplemental requirement SR-995-
2.7.2-01, Supplemental Wrong Way Vehicle Detection System SunGuide HTTP Protocol, as
published on the Department’s State Traffic Engineering and Operations Office website at the
following https://www.fdot.gov/traffic/Traf-Sys/Product-Specifications.shtm.
wrong-way vehicle is detected.
SunGuide software that covers a configurable time before and after the wrong-way vehicle
detection.
WWVDS.
an alert to the SunGuide® software when the wrong-way vehicle is detected.
compliant with the Code of Federal Regulations Section 200.216 Prohibition on certain
telecommunications and video surveillance services or equipment
https://www.ecfr.gov/current/title-2/subtitle-A/chapter-II/part-200/subpart-C/section-200.216.
995-2.7.3 Electrical Specifications: Equipment shall operate on solar power or
with an input voltage ranging from 89 to 135 VAC. If the device requires operating voltages of
less than 120 VAC, supply the appropriate voltage converter. Solar powered systems shall be
designed to operate for minimum of 5 activations per day and provide 10 days of operation
without sunlight.
995-2.8Vehicle Presence Detection System Performance Requirements: Presence
detectors shall provide a minimum detection accuracy of 98% and shall meet the requirements
for modes of operation in NEMA TS2-2021, 6.5.2.17. 1206FY 2023-24Return to Table of Contents
995-2.8.1 Vehicle Presence Detection Accuracy: To verify conformance with
the accuracy requirements in this Section and as a precondition for listing on the APL, sample
data collected from the vehicle detection system will be compared against ground truth data
collected during the same time by human observation or by another method approved by the
FDOT Traffic Engineering Research Laboratory (TERL). Ensure sample data is collected over
several time periods under a variety of traffic conditions. Weight each data sample to represent
the predominant conditions over the course of a 24-hour period. Samples will consist of 15- and
30-minute data sets collected at various times of the day. Representative data periods and their
assigned weights are provided in Table 995-2.
Table 995-2
Data Collection Periods
Period Intended To Represent Duration Weight
Early morning (predawn)
[EM] 12:30 a.m. – 6:30 a.m. 15 minutes 24
Dawn [DA] 6:30 a.m. – 7:00 a.m. 30 minutes 2
AM Peak [AMP] 7:00 a.m. – 8:00 a.m. 15 minutes 4
Late AM Off-Peak [LAOP] 8:00 a.m. – 12:00 p.m. 15 minutes 16
Noon [NO] 12:00 p.m. – 1:00 p.m. 15 minutes 4
Afternoon Off-Peak [AOP] 1:00 p.m. – 5:00 p.m. 15 minutes 16
PM Peak [PMP] 5:00 p.m. – 6:00 p.m. 15 minutes 4
Dusk [DU] 6:00 p.m. - 6:30 p.m. 30 minutes 2
Night [NI] 6:30 p.m. - 12:30 a.m. 15 minutes 24
Total Sum of Weights 96
For example, the sample gathered for the Late AM Off-Peak period is intended to
represent typical traffic conditions between 8:00 a.m. and 12:00 p.m. Since the sample period’s
duration is 15 minutes and the actual period of time represented is 4 hours, the multiplication
factor or weight assigned is 16, the number of 15-minute intervals in a 4 hour period.
995-2.8.2 Calculation of Vehicle Presence Detection Accuracy: Determine
individual lane presence detection accuracy per period by subtracting from 100 percent the
absolute difference of the total time monitored and the cumulative error time, divided by total
time, expressed as a percentage.
In the equation in 995-2.8.2.1, “EM” represents the early morning period. The
variable “i” represents a detector or detection zone and could vary from 1,…, N, where “N” is
the total number of detectors observed. Substitute other detector numbers and periods as
necessary to determine accuracy for all detectors during each period (i.e., dawn, AM peak, late
AM off peak, etc.).
Variables used in the following equations are identified as follows:
PA = Presence detection accuracy
TT = Total time
CET = Cumulative Error Time (duration of all false and missed calls)
N=Total number of detectors observed 1207FY 2023-24Return to Table of Contents
995-2.8.2.1 Early Morning Vehicle Presence Detection Accuracy for a
Single Detector Expressed as a Percentage:
where:
= Presence detection accuracy of detector i during
the early morning period.
= Total time that detector i was monitored (for
instance, the 15-minute minimum duration specified in Table 995-2 for the early morning
period).
= Cumulative time that detector i was in an error
state (indicating a detection with no vehicle present or not indicating a detection when vehicle
present) during the monitoring period using human observation or another method approved by
the Engineer.
The period accuracy will be the arithmetic mean of all individual
detector accuracies.
In the equation in 995-2.8.2.2, “EM” represents the early morning
period and “N” is the total number of detectors tested. Substitute other periods as necessary to
determine the accuracy for each period (i.e., dawn, AM peak, late AM off-peak, etc.).
995-2.8.2.2 Early Morning Vehicle Presence Detection Accuracy for
All Detectors Expressed as a Percentage:
Where:
= Average accuracy of all detectors during the early
morning.
= Accuracy of detector i during early morning.
Calculate the roadway segment accuracy over all periods using the
equation in 995-2.7.2.3. 100100
det,
det,det,
det, x
TT
CETTT
PA
i
ii
i
EM
EMEM
EM
−
−= iEM PA det, iEM TT det, iEM CET det,
=
∑ =
N
PA
PA
N
i
EM
EM
i
det, EM PA iEM PA det, 1208FY 2023-24Return to Table of Contents
995-2.8.2.3 Total Vehicle Presence Detection Accuracy for All
Detectors Expressed as a Percentage:
Where:
PATotal =Accuracy for all detectors for all periods
PAEM = Accuracy of all detectors during early morning
traffic conditions
PADA = Accuracy of all detectors during dawn traffic
conditions
PAAMP = Accuracy of all detectors during AM peak traffic
conditions
PALAOP = Accuracy of all detectors during late AM off-
peak traffic conditions
PANO = Accuracy of all detectors during noon traffic
conditions
PAAOP = Accuracy of all detectors during afternoon off-
peak traffic conditions
PAPMP = Accuracy of all detectors during PM peak traffic
conditions
PADU = Accuracy of all detectors during dusk traffic
conditions
PANI = Accuracy of all detectors during night traffic
conditions
995-2.9Traffic Data Detection System Acceptance Requirements:
995-2.9.1 Data Accuracy: The vehicle detection system shall be capable of
meeting the minimum total roadway segment accuracy levels of 95% for volume, 90% for
occupancy, and 90% for speed for all lanes, up to the maximum number of lanes that the device
can monitor as specified by the manufacturer.
To verify conformance with the accuracy requirements in this Section and
as a precondition for listing on the APL, sample data collected from the vehicle detection system
will be compared against ground truth data collected during the same time by human observation
or by another method approved by the TERL. Sample data shall be collected over several time
periods under a variety of traffic conditions. Weight each data sample to represent the
predominant conditions over the course of a 24-hour period. Samples shall consist of 15- and
30-minute data sets collected at various times of the day. Representative data periods and their
assigned weights are provided in Table 995-2.
995-2.9.2 Calculation of Volume Accuracy: Determine individual lane volume
accuracy per period by subtracting from 100 percent the absolute difference of the total volume
measured by the detector and the ground truth volume measurement, divided by the ground truth
volume measurement, expressed as a percentage.
In the equation in 995-2.9.2.1, “EM” represents the early morning period.
The subscript “i” represents a lane at the detection zone on the roadway segment and could vary
from 1,…, N, where “N” is the maximum number of lanes being detected. Substitute other lane
numbers and periods as necessary to determine the accuracy for each lane during each period
(i.e., dawn, AM peak, late AM off-peak, etc.). [ ]
96
2424164164224 xPAxPAxPAxPAxPAxPAxPAxPAxPA
PA NIDUPMPAOPNOLAOPAMPDAEM
Total
++++++++
= 1209FY 2023-24Return to Table of Contents
Variables and subscripts used in the equations below are identified
as follows:
VT = Total volume
VD = Vehicle detection data (in this case, count data)
GT = Ground truth measurement
VA = Volume accuracy
995-2.9.2.1 Early Morning Volume Accuracy for a Lane Expressed as
a Percentage:
Where:
= Volume accuracy for early morning traffic
conditions in the i th lane.
= Total volume for the 15-minute early morning
period using the vehicle detector in the i th lane.
= Total volume for the 15-minute early morning
period in the i th lane using human observation or another method approved by the Engineer.
The period volume accuracy will be the arithmetic mean of the lane
volume accuracy over all lanes.
In the equation in 995-2.9.2.2, “EM” represents the early morning
period and “N” is the total number of lanes of detection on the roadway segment under test.
Substitute other periods as necessary to determine the accuracy for each period (i.e., dawn, AM
peak, late AM off-peak, etc.).
995-2.9.2.2 Early Morning Volume Accuracy Expressed as a
Percentage:
Where:
= Average volume accuracy for early morning traffic
conditions for all lanes.
= Volume accuracy for early morning traffic conditions in
the i th lane.
Calculate the total volume accuracy over all periods using the equation in
995-2. 9.2.3. 100100
ln,,
ln,,ln,,
ln, x
VT
VTVT
VA
i
ii
i
GTEM
GTEMVDEM
EM
−
−= iln,EM VA iln,VD,EM VT iln,GT,EM VT
=
∑ =
N
VA
VA
N
i
EM
EM
i
ln, EM VA iln,EM VA 1210FY 2023-24Return to Table of Contents
995-2.9.2.3 Total Volume Accuracy Expressed as a Percentage:
Where:
VATotal = Volume accuracy for all lanes for all periods
VAEM = Volume accuracy for early morning traffic
conditions
VADA = Volume accuracy for dawn traffic conditions
VAAMP = Volume accuracy for AM peak traffic conditions
VALAOP = Volume accuracy for late AM off-peak traffic
conditions
VANO = Volume accuracy for noon traffic conditions
VAAOP = Volume accuracy for afternoon off-peak traffic
conditions
VAPMP = Volume accuracy for PM peak traffic conditions
VADU = Volume accuracy for dusk traffic conditions
VANI = Volume accuracy for night traffic conditions
995-2.9.3 Calculation of Speed Accuracy: For computing the accuracy of the
detector speed measurement, the average speed readings obtained from the detection system are
compared to ground truth values.
The equation in 995-2.9.3.1 represents the ground truth average speed
computation procedure for a particular lane during a specific time period. The equation in 995-
2.9.3.2 represents the average speed computation procedure for a particular lane during a specific
time period using data gathered from the detection system.
In the equations in 995-2.9.3.1 and 995-2.9.3.2, the time period described
is the early morning period, represented by “EM”, and the subscript “k” represents a vehicle
traveling on the roadway and could vary from 1,…, K, where “K” is the total number of vehicles
in lane i during the time period under consideration. The subscript “i” represents a lane in a
roadway and could vary from 1,…, N, where “N” is the total number of lanes of detection on the
roadway segment. Substitute other lanes and periods as necessary and compute the accuracy for
each lane for all time periods.
Variables and subscripts used in the equations below are identified as
follows:
SA = Speed accuracy
S = Speed of an individual vehicle
K = Total number of vehicles in lane during time period
veh = Vehicle [ ]
96
24xVA2xVA4xVA16xVA4xVA16xVA4xVA2xVA24xVA
VA NIDUPMPAOPNOLAOPAMPDAEM
Total
++++++++
= 1211FY 2023-24Return to Table of Contents
995-2.9.3.1 Early Morning Average Ground Truth Speed:
Where:
represents the average ground truth vehicle
speed for the i th lane during the early morning period.
represents the ground truth speed for the k th
vehicle in the i th lane during the early morning period using human observation or another
method approved by the Engineer.
995-2.9.3.2 Early Morning Average Vehicle Detector Speed:
Where:
represents the average speed recorded by the
vehicle detector for the i th lane during the early morning period.
represents the speed for the k th vehicle in the
i th lane during the early morning period using the vehicle detector.
Determine lane speed accuracy per period by subtracting from
100 percent the absolute difference of the average lane speed measured by the detector and the
average lane ground truth speed, divided by the average lane ground truth speed, expressed as a
percent.
In the equation in 995-2.9.3.3, “EM” represents the early morning period.
The subscript “i” represents a lane of detection on a roadway and could vary from 1,…,N, where
“N” is the total number of lanes of detection on the roadway segment. Substitute other lanes as
necessary to determine the accuracy for each period (i.e., dawn, AM peak, late AM off-peak,
etc.).
995-2.9.3.3 Early Morning Lane Speed Accuracy Expressed as a
Percentage:
Where:
represents the average speed accuracy during
early morning traffic conditions for all vehicles that traveled in lane i of the roadway segment.
The period speed accuracy will be the arithmetic mean of the lane
speed accuracy, computed using the equation in 995-2.9.3.3, over all lanes.
In the equation in 995-2.9.3.4, “EM” represents the early morning
period. The subscript “i” represents a lane of detection on a roadway and could vary from 1,…,
N, where “N” is the maximum number of lanes on the roadway segment. Substitute data as ∑ =
=
K
k
vehGTEMGTEMAvg kii S
K
S
,ln,,ln,,,
iln,GT,EM,Avg SA ki veh,ln,GT,EM S ∑ =
=
K
k
vehVDEMVDEMAvg kii S
K
S
,ln,,ln,,,
iln,VD,EM,AvgS ki veh,ln,VD,EM S 100100
ln,,,
ln,,,ln,,,
ln,, ×
−
−=
i
ii
i
GTEMAvg
GTEMAvgVDEMAvg
EMAvg S
SS
SA iln,EM,Avg SA 1212FY 2023-24Return to Table of Contents
necessary to determine the accuracy for each period (i.e., dawn, AM peak, late AM off-peak,
etc.).
995-2.9.3.4 Early Morning Speed Accuracy Expressed as a
Percentage:
Where:
represents the average speed accuracy during early
morning traffic conditions for all lanes of detection on the roadway segment.
Calculate detector speed accuracy for the roadway segment over
all periods using the equation in 995-2.9.3.5.
995-2.9.3.5 Total Roadway Segment Accuracy Expressed as a
Percentage:
Where:
SATotal = Speed accuracy for all lanes for all periods
SAEM = Speed accuracy for early morning traffic conditions
SADA = Speed accuracy for dawn traffic conditions
SAAMP = Speed accuracy for AM peak traffic conditions
SALAOP = Speed accuracy for late AM off-peak traffic
conditions
SANO = Speed accuracy for noon traffic conditions
SAAOP = Speed accuracy for afternoon off-peak traffic
conditions
SAPMP = Speed accuracy for PM peak traffic conditions
SADU = Speed accuracy for dusk traffic conditions
SANI = Speed accuracy for night traffic conditions
995-2.10Probe Data Detection System Performance Requirements: Probe data
detectors shall establish a unique and consistent identifier for each vehicle detected and the time
and location that the vehicle was detected and shall provide the following:
match upstream and downstream detection of the same vehicle
of 90%. Verify system performance over several time periods under a variety of traffic
conditions as described in 995-2.9.1.
995-2.10.1 Calculation of Match Rate: Match rate is the percentage of the total
vehicle population of a road segment that is detected and matched at consecutive probe data
detection sites.
=
∑ =
N
SA
SA
N
i
EMAvg
EM
i
ln,, EM SA 96
]2424164164224[ xSAxSAxSAxSAxSAxSAxSAxSAxSA
SA NIDUPMPAOPNOLAOPAMPDAEM
Total
++++++++
= 1213FY 2023-24Return to Table of Contents
995-2.10.1.1 Early Morning Match Rate Expressed as a Percentage:
Where:
= Match Rate for early morning.
= Number of matched detections between two
probe vehicle detection sites (typically a pair of sites at each end of a roadway segment) during
early morning.
= Total volume of vehicles that pass the detection
area for the 15-minute early morning period using human observation or another method
approved by the Engineer.
995-2.11Wrong Way Vehicle (WWVDS) Detection System Performance
Requirements: To verify conformance with the accuracy requirements in this Section and as a
precondition for listing on the APL, the wrong way detection system will be evaluated at the
FDOT Traffic Engineering Research Lab (TERL). Under controlled conditions at the TERL
facility, the wrong way detection system must be capable of meeting the detection accuracy of
100% and zero false positive readings, using a sample size of 200 vehicles.
995-3Loop Sealant
Loop sealant shall be furnished in a premeasured two-part formulation and meet the
following requirements: 100100
,
,, ×
−
−=
GTEM
GTEMVDEM
EM V
VM
MR EM MR VDEM M , GTEM V , 1214FY 2023-24Return to Table of Contents
Table 995-3
Loop Sealant Properties
Property Test Method Performance Criteria
Self-leveling
Viscosity ASTM D562 @77°F Sealant shall not run out of unlevel slots
Adhering to
concrete and
asphalt
Install in 3/8 inch by 3-
inch saw cut, cure for 2
weeks at 77°F
Visual inspection: sealant shall securely adhere
to concrete and asphalt
No visible signs of shrinkage after curing when
tested for shrinkage using a dimensional
measurement
Curing ASTM C679 at 77°F Tack-Free at 2 hours from time of application
Resistance to
Fluids
ASTM D570 Sealant shall resist weather, oils, gasoline,
antifreeze, and brake fluid when tested for
absorption for water, No. 3 oil, gasoline,
antifreeze, and brake fluid for 24 hours
Penetration ASTM D2240 Shore A Sealant shall resist penetration of foreign
materials when tested for durometer hardness
for 24 hours
Expansion
Cracking
ASTM D412 Sealant shall resist cracking caused by
expansion and contraction due to temperature
changes when tested for tensile strength and
elongation
Cracking ASTM C1246 Sealant shall not become brittle with age or
temperature extremes when tested for weight
loss, cracking, and chalking
Shelf Life Manufacturer’s
Recommendations
Sealant shall have a minimum shelf life of 12
months when stored in accordance with the
manufacturer recommendations
995-4Vehicular Traffic Signal Assemblies
995-4.1General: Vehicular traffic signal assemblies must meet the requirements of
Fastening hardware such as bolts, screws, nuts, washers, latches, and studs must
be SAE Type 316 or 304 stainless steel.
Horizontal signal assemblies must be constructed so the door hinges, when
installed, are located on the bottom of the signal assembly. Vertical mounted five-section cluster
assemblies must be constructed so that the door hinges, when installed, are located along the
outside edges of the complete assembly and each section opens away from the horizontally
adjacent section.
995-4.2Twelve Inch Signal Head Assemblies: Construct the assembly of materials and
alloys specified in the ITE Standard for Vehicle Traffic Control Signal Heads.
Construct signal housings to allow adjustment in multiple directions for proper
signal alignment. If a serrated connection is used for positioning and alignment of the signal, the
top and bottom opening of each signal head section must include a circular 72-tooth serrated
connection (2-inch nominal I.D.) capable of providing positive positioning and alignment in 5- 1215FY 2023-24Return to Table of Contents
degree increments. When assembled and tightened, these connections must prevent rotation or
misalignment of the signal head as well as misalignment between sections. The serrated area
must start at the outside of the 2-inch hole and be at least 1/8 inch wide. The teeth must have a
minimum depth of 3/64 inch between peaks and valleys, be free from burrs or other
imperfections, and provide positive locking with the grooves of mating sections, framework, and
brackets. The serration on the top circular connection of a signal section must have a valley at the
0-degree position and the serration on the bottom circular connection must have a peak at the 0-
degree position, both aligned perpendicular to the front of the section. Connections must permit
the assembly of a multi-section signal with the front of each section aligned within 1 degree.
Provide at least two latching points with latch pads and manual Type 316 or 304
stainless steel latching devices that are tamper resistant.
If backplates are mechanically attached, each signal section must have four
backplate mounting attachment points on the back of the signal, on or no more than three inches
from each section corner. Attachment points must be capable of accepting No. 10-16x3/8 inch or
No. 10-24x3/8 inch Type 316 or 304 stainless steel screws for attaching backplates.
Tri-stud washers, when utilized to secure signal sections, must have a minimum
thickness of 0.090 inch. For five-section cluster assemblies, tri-stud washers used to attach the
top signal section to the multi-signal bracket and the multi-signal bracket to the bottom four
signal sections must have a minimum thickness of 3/8 inch. When fastened together, washer
distortion is not allowed.
Design each signal section to prevent the accumulation of standing water within
the assembly. All sections comprising a single multi-section assembly must be securely fastened
together to form a rigid and weather-proof unit.
995-4.2.1 Doors: Construct each signal section with at least two hinges for
mounting a door. Hinge pins must be captive. Doors must remain captive and secure at all times
and be capable of either left or right swing. The door latch must hold the door tightly closed. The
door must include slotted pads that allow the door to be opened and closed by engaging or
disengaging the latching device. The outside face of the door must include four holes equally
spaced around the circumference of the lens opening for the attachment of a visor. The lens
opening in the door must have a diameter of 11 to 11-1/2 inches.
995-4.2.2 Visors: The rear of the visor must have four tabs, notches, or holes for
securing the visor to the signal housing door. The visor mounting method must permit the visor
to be rotated and secured at 90 degrees for horizontal signal head installations. All visors must
have a minimum length of 9-1/2 inches, and a minimum downward tilt of 3.5 degrees measured
from the center of the lens. Tunnel visors must encircle and shield the lens from 300 degrees,
plus or minus 10 degrees. Louvers may only be used in combination with full circle visors. Light
must not escape between the visor and the door.
995-4.2.3 Gaskets: Gaskets must be constructed of weather-resistant material and
be glued or sealed where they meet to provide one continuous length of gasket capable of
providing a weatherproof seal for the signal assembly. Provide seals between the housing and
door, between the lens and the door, and between any other mating surfaces where dust and
moisture could enter. Gasket material must meet NEMA 250 and be constructed of temperature
stabilized material that prevents any residue from collecting on the internal surfaces of the signal
head.
995-4.2.4 Terminal Blocks: Provide at least one five-connection terminal block
in all three or more section signal head assemblies and at least three five-connection terminal 1216FY 2023-24Return to Table of Contents
blocks in all five section signal head assemblies. Terminal block connections in the signal
assembly must not require any tools other than a screwdriver.
Mount terminal blocks to the signal housing with Type 316 or 304
passivated stainless steel hardware. Use only non-corrosive wire attachment screws approved by
the Department.
995-4.2.5 Color and Finish: The housing, doors, visors and backplates must be
powder coated dull black (Federal Standard 595-37038) with a reflectance value not exceeding
25 percent as measured by ASTM E1347. For plastic heads, the black color must be incorporated
into the plastic material before molding.
The finish on interior and exterior surfaces of aluminum signal head
assemblies, visors, doors, and housing, must be painted in accordance with Military Standard
MIL-PRF-24712A or American Architectural Manufacturers Association (AAMA) -2603-02 and
must meet the requirements of ASTM D3359, ASTM D3363, and ASTM D522. Surface erosion,
flaking, or oxidation must not occur within the normal life expectancy under typical installation
conditions.
995-4.2.6 Plastic Signal Housings and Visors: Construct signal housing
assembly, door, and visors of UV stabilized plastic with a minimum thickness of 0.1 inch, plus or
minus, 0.01 inch, with the following physical properties:
Table 995-4
Plastic Signal Housings and Visors
Test Minimum Requirement Method
Specific Gravity 1.17 ASTM D792
Vicat Softening Temp. 305-325°F (152 – 163°C) ASTM D1525
Brittleness Temp. Below -200°F (-129°C) ASTM D746
Flammability Self-extinguishing ASTM D635
Tensile Strength Yield, 8500 psi (58 MPa) ASTM D638
Elongation at yield 5.5 - 8.5% ASTM D638
Shear Strength Yield, 5500 psi (38 MPa) ASTM D732
Izod impact strength 15ft-lb/in (800 J/m) ASTM D256
Fatigue strength 950 psi (6.5MPa) at 2.5 mm cycles ASTM D671
Fatigue strength 950 psi (6.5MPa) at 2.5 mm cycles ASTM D671
995-4.2.7 Backplates: Backplates may be constructed of either aluminum or
plastic. Minimum thickness for aluminum backplates is 0.060 inch and the minimum thickness
for plastic backplates is 0.120 inch. The required width of the top, bottom, and sides of
backplates must measure between five to six inches. Color of backplates must be black in
accordance with 995-4.2.5. Backplate thickness measurement must not include the retroreflective
sheeting thickness.
If backplates are mechanically attached, provide a minimum of four corner
mounting attachment points per signal section (for example, a three-section signal assembly
would have 12 mounting points). Attachment points must not interfere with the operation of
traffic signal section doors. Backplate outside corners must be rounded and all edges must be de-
burred.
If louvers are provided, louver orientation must be vertical on sides and
horizontal on top and bottom of the backplate and must be at least 1/2 inch from the inner and 1217FY 2023-24Return to Table of Contents
outer edge of the backplate panel. Universal backplates must fit all traffic signals listed on the
APL.
Mount the backplate securely to the signal assembly with Type 316 or 304
passivated stainless steel installation hardware. Backplates, if mechanically attached, must be
marked in accordance with 995-1, on the long sides of the backplate.
Backplates must include retroreflective borders using Type IV yellow
retroreflective sheeting listed on the APL. Place a 2-inch border on the entire outer perimeter of
the backplate panel, no closer than 1/2 inch from any louvers.
All materials must be designed for exterior use and be UV stable.
995-4.2.7.1 Flexible Backplates: Flexible backplates must allow the
entire length of longer portions of the backplate to flex 90 degrees, or until the backplate width is
reduced to 2.5 inches or less, when influenced by high wind conditions, and return to zero
degrees after the wind conditions subside. Flexible backplates must maintain visibility of the
retroreflective border to approaching traffic, with up to 40 mph winds.
995-4.2.8 Light-Emitting Diode Optical Unit: The LED optical unit must
conform to the requirements of ITE’s Performance Specification, Vehicle Traffic Control Signal
Heads - Light Emitting Diode (LED) Circular Signal Supplement, dated June 27, 2005 or
Vehicle Traffic Control Signal Heads - Light Emitting Diode (LED) Vehicle Arrow Traffic
Signal Supplement, dated July 1, 2007, with the following exceptions.
housings listed on the APL. The rear of the LED signal module must be marked in accordance
with 995-4.1.
to reduce sun phantom affect and enhance on/off contrast. The tinting must be uniform across the
face of the lens and be free from streaks, wrinkles, chips, bubbles, or other imperfections. If a
polymer lens is used, a surface coating must be incorporated to provide abrasion resistance.
Performance Specification, Vehicle Traffic Control Signal Heads - Light Emitting Diode (LED)
Circular Signal Supplement, dated June 27, 2005, with the exception that yellow modules must
be 1.7 times brighter than the ITE specification. Arrow modules must meet the requirements of
ITE’s Performance Specification, Vehicle Traffic Control Signal Heads - Light Emitting Diode
995-4.2.9 Electrical: Electrical conductors for LED signal modules must be a
minimum of 36 inches in length. Each lead from the LED module must be terminated with
insulated slide-on terminals. The conductors must be color coded to identify the color of the
module as follows:
signals with a yellow lead, and green circular signals with a green lead.
arrows with a yellow and black tracer lead, and green arrows with a green and black tracer lead.
995-5Pedestrian Signal Assemblies
995-5.1General: Pedestrian signal assemblies must meet the requirements of
Section 603, the MUTCD, and the ITE standard for Pedestrian Traffic Control Signal
Indications. 1218FY 2023-24Return to Table of Contents
995-5.2Housing and Visor: The housing must be weatherproof, sectional and may
consist of as many sections as optical units. The housing must prevent light from escaping from
one unit to another. The top and bottom opening of the housing must include a circular 72-tooth
serrated connection (2-inch nominal I.D.) capable of providing positive positioning and
alignment in 5 degree increments. When assembled and tightened, these connections must
prevent rotation or misalignment. The serrated area must start at the outside of the 2-inch hole
and be at least 1/8 inch wide. The teeth must have a minimum depth of 3/64 inch between peaks
and valleys, free from burrs or other imperfections, and provide positive locking with the
grooves of mating sections, framework, and brackets. The serration on the top circular
connection of a signal section must have a valley at the 0-degree position and the serration on the
bottom circular connection must have a peak at the 0-degree position, both aligned perpendicular
to the front of the section. Housings must include latch pads and manual stainless steel latching
devices that are captive, or non-removable. Housings must have at least two latching points.
Reinforce all mounting points and adjacent housing material. The door enclosing
the lens must be hinged and held securely to the housing. Provide a gasket meeting the
requirements of ASTM D1056, Grade 2B2 between the housing and door and between the lens
and door. If the fitting between the housing and door is weather-tight, the gasket may be omitted.
Provide a visor or egg-crate louver that eliminates sun phantom for each signal
face. Visor must be three-sided and extend a minimum of 7 inches at the top from the face of the
lens. The visor must be constructed of noncorrosive No. 18 gauge sheet metal, not less than
0.05 inch thick, or 0.1 inch thick polycarbonate.
All metal housings and visors must be powder-coat painted black in accordance
with Military Standard MIL-PRF-24712A or AAMA-2603-02 with a reflectance value not
exceeding 25 percent as measured by ASTM E97. For polycarbonate heads, the black color must
be incorporated into the material before the molding process.
The housing must be constructed of a non-corrosive material. Cast metal parts
must have a minimum tensile strength of 1 ksi (117 MPa) and sheet metal parts a minimum
tensile strength of 27 ksi (186 MPa).
995-5.2.1 Die Castings: Meet the requirements in ASTM B85 for the physical
characteristics and chemical content for alloys S12A, S12B, SC84A, SC84B, SG100A and
SG100B.
995-5.2.2 Sand Castings: Meet the requirements in ASTM B26 for the physical
characteristics and chemical content for alloys S5A and CS72A.
995-5.2.3 Permanent Mold Castings: Meet the requirements in ASTM B108 for
the physical characteristics and chemical content for alloys S5A and CS72A.
995-5.2.4 Polycarbonate: Polycarbonate housing assemblies, doors and visors
must be molded from ultraviolet stabilized polycarbonate plastic with a minimum thickness of
0.1 inch, plus or minus 0.01 inch, and provide the following physical properties: 1219FY 2023-24Return to Table of Contents
Table 995-5
Polycarbonate Housing Assemblies, Doors, and Visors
Test Minimum Requirement Method
Specific Gravity 1.17 ASTM D792
Vicat Softening Temp. 305-325°F (152 – 163°C) ASTM D1525
Brittleness Temp. Below -200°F (-129°C) ASTM D746
Flammability Self-extinguishing ASTM D635
Tensile Strength Yield, 8500 psi (58 MPa) ASTM D638
Elongation at yield 5.5 - 8.5% ASTM D638
Shear Strength Yield, 5500 psi (38 MPa) ASTM D732
Izod impact strength 15ft-lb/in (800 J/m) ASTM D256
Fatigue strength 950 psi (6.5MPa) at 2.5 mm cycles ASTM D671
995-5.3Light Emitting Diode (LED) Pedestrian Signal Optical Unit (State
Standard): Provide a countdown pedestrian signal module meeting the requirements of the latest
ITE LED Pedestrian Signal Specifications.
995-5.4Electrical: Wiring and terminals must meet the size, insulation, length, and
color-coding of the current ITE Pedestrian Traffic Control Signal Indicators LED specification.
Wires must not have bare wiring exposed where wires are secured.
The pedestrian signal must include a terminal block containing a minimum of
three circuits, each with two noncorrosive screw-type terminals. Each terminal must
accommodate three No. 18 AWG conductors and be labeled for ease of identification. The
terminal block must not be obstructed and be visible when the housing is open.
995-5.5Hardware: All brackets used to mount pedestrian signals must be an aluminum
alloy cast fitting, pipe, or equivalent material approved by the Department. Aluminum and
aluminum alloy bars, rods, wires, profiles, and tubes must meet ASTM B221. Aluminum-alloy
sand casting must meet ASTM B26. All mounting hardware must be painted black with a
reflectance value not exceeding 25 percent as measured by ASTM E97.
Ensure that all assembly hardware, including nuts, bolts, external screws and
locking washers less than 5/8 inch in diameter, are Type 304 or 316 passivated stainless steel.
Stainless Steel bolts, screws and studs must meet ASTM F593. Nuts must meet ASTM F594. All
assembly hardware greater than or equal to 5/8 inch in diameter must be galvanized. Bolts, studs,
and threaded rod must meet ASTM A307. Structural bolts must meet ASTM F3125,
Grade A325.
995-6Midblock Crosswalk Enhancement Assemblies
995-6.1General: Midblock crosswalk enhancement assemblies are classified as the
following types: In-Roadway Light Assemblies and Rectangular Rapid Flashing Beacon
Assemblies (RRFB).
995-6.2In-Roadway Light Assemblies: In-roadway light assemblies must meet the
physical and operational requirements of the latest edition of the MUTCD, Chapter 4N.
In-roadway light assemblies can include a passive detector in addition to a
pedestrian pushbutton. In-roadway light assemblies must be normally dark and initiate operation
upon pedestrian actuation via a pedestrian pushbutton or a passive detector. The In-roadway light
assembly will cease operation at a predetermined time after the pedestrian actuation. If a passive
detector is used, the In-roadway light assembly may cease operation after the pedestrian clears 1220FY 2023-24Return to Table of Contents
the crosswalk. The duration of the predetermined period shall be programmable and capable of
matching the pedestrian clearance time for pedestrian signals as determined by MUTCD
procedures. The timer that controls flashing must automatically reset each time a pedestrian call
is received.
In-roadway light assemblies must have a minimum luminance of 101 candelas
and a minimum viewing angle of 20 degrees.
995-6.3Rectangular Rapid Flashing Beacon (RRFB): RRFB must include two rapidly
and alternately flashed rectangular yellow indications having LED-array based pulsing light
sources. Each rectangular yellow indication must be a minimum of five inches wide by two
inches high. RRFB installations shall comply with the use and technical conditions of FHWA
MUTCD Interim Approval 21 – Rectangular Rapid-Flashing Beacons at Crosswalks. The two
RRFB indications shall be aligned horizontally, with the longer dimension horizontal and with a
minimum space between the two indications of approximately 7 inches measured from inside
edge of one indication to inside edge of the other indication.
995-6.3.1 Beacon Flashing Requirements: The light intensity of the yellow
indications shall meet the minimum specifications of SAE Standard J595 for Class 1 (Directional
Flashing Optical Warning Devices for Authorized Emergency, Maintenance, and Service
Vehicles) dated January 2005. Ensure RRFB assemblies are capable of automatically dimming to
reduce brightness of the LEDs at nighttime.
The flash rate of each individual yellow indication, as applied over the full
on-off sequence of a flashing period of the indication, shall not be between 5 and 30 flashes per
second. When activated, the two yellow indications in each RRFB shall have a flash rate of
75 flash cycles per minute using the following sequence: left side beacon on for 50 milliseconds
(msec), both beacons off for 50 msec, right side beacon on for 50 msec, both beacons off for
50 msec, left side beacon on for 50 msec, both beacons off for 50 msec, right side beacon on for
50 msec, both beacons off for 50 msec, both beacons on for 50 msec, both beacons off for
50 msec, both beacons on for 50 msec, both beacons off for 250 msec. No other flash patterns
shall be selectable via hardware or software.
995-6.3.2 RRFB Operation: RRFB can include a passive detector in addition to
a pedestrian pushbutton. RRFBs must be normally dark and initiate operation only upon
pedestrian actuation via a pedestrian pushbutton, or a passive detector. The RRFB will cease
operation at a predetermined time after the pedestrian actuation. If the passive detector is used,
the RRFB may cease operation after the pedestrian clears the crosswalk. The duration of the
predetermined period shall be programmable and capable of matching the pedestrian clearance
time for pedestrian signals as determined by MUTCD procedures. The timer that controls
flashing must automatically reset each time a pedestrian call is received.
All RRFBs associated with a single crosswalk (including those with an
overhead or advance crossing sign, if used) shall simultaneously commence operation of their
alternating rapid flashing indications and shall cease operation simultaneously.
RRFBs must include an instruction sign (FTP-68C-21) mounted adjacent
to or integral with each pedestrian pushbutton, in accordance with the Standard Plans, Index
No. 654-001.
A confirmation light directed at and visible to pedestrians in the crosswalk
must be installed integral to the RRFB to give confirmation that the RRFB is in operation.
995-6.3.3 Midblock Accessible Pedestrian Pushbutton: The assembly must
contain a speaker, audio amplifier, and noise monitoring microphone for auto volume control. 1221FY 2023-24Return to Table of Contents
The accessible pedestrian pushbutton detector must meet 995-9.3 for the
locator tone feature. The pushbutton must not include a vibrotactile indication or percussive
indications. The audible message must be programmable.
995-6.4Cabinets, Housings, and Hardware: Cabinets used as part of the midblock
crosswalk enhancement assembly must be currently listed on the APL or meet the requirements
of Section 676.
All housings other than approved cabinets must be powder coat painted dull black
FED-STD-595-37038) with a reflectance value not exceeding 25 percent as measured by
ASTM E1347. Cabinets and housings must prevent unauthorized access.
Pole-mount assemblies shall allow installation on 4-1/2 inch outer diameter posts.
Ensure all assembly hardware, including nuts, bolts, external screws, and locking
washers less than 5/8 inch in diameter, are Type 304 or 316 passivated stainless steel. Stainless
steel bolts, screws, and studs must meet ASTM F593. Stainless steel nuts must meet
ASTM F594. All assembly hardware greater than or equal to 5/8 inch in diameter must be
galvanized. Carbon steel bolts, studs, and threaded rod must meet ASTM A307. Structural bolts
must meet ASTM F3125, Grade A325.
995-6.5Electrical Specifications: Equipment must operate on solar power or a nominal
voltage of 120 VAC. If the device requires operating voltages of less than 120 VAC, supply the
appropriate voltage converter. Solar powered systems must be designed to operate for minimum
of 100 activations per day and provide 10 days of operation without sunlight. Each activation
must be 30 seconds in duration. Solar powered systems must automatically charge batteries and
prevent overcharging and over-discharging. Solar powered systems must include a charge
indicator.
995-6.6Environmental Specifications: All electronic assemblies shall operate as
specified during and after being subjected to the transients, temperature, voltage, humidity,
vibration, and shock tests described in NEMA TS2, 2.2.7, 2.2.8, and 2.2.9. Electronics must meet
FCC Title 47, Subpart B, Section 15. The optical portion of the housing shall be sealed to
provide an IP 67 rating.
995-7Mast Arm, Span Wire, and Pole Mounting Assemblies
995-7.1General: Fastening hardware such as bolts, nuts, washers, set screws, studs, u-
bolts, cable and cable swags, must be provided by the mounting assembly manufacturer, must be
SAE Type 316 or 304 stainless steel. Hardware (studs, bolts and u-bolts) must be a minimum of
5/16 inch diameter unless otherwise specified in this Section. SAE Grade 8 bolts and nuts are
also acceptable. Metallic mounting assemblies must meet ASTM B117 for corrosion resistance.
Connections that provide an entrance to the interior of a traffic device must be
weather-resistant.
All assemblies must be constructed to support the weight of any combination of
signal indications with all accessories such as back plates and visors.
Connections between signal, disconnect and disconnect hanging hardware must
be of the tri-stud design unless otherwise specified in this Section. Tri-stud washers must be a
minimum 0.090 inch thick unless otherwise specified in this Section.
Connections must be designed to mate with a standard traffic signal's 2-inch I.D.
opening and must be capable of providing positive positioning and alignment of the traffic
device. Connection type may be a 72-tooth serrated edge or other connection type as long as all
other specifications are met. For 72-tooth serrated edge connections, the teeth must be clean, 1222FY 2023-24Return to Table of Contents
sharp, and at least 1/8 inch wide and 3/64 inch deep. All connection types must be weather
resistant.
All mounting assemblies must be capable of providing adjustment in multiple
directions for proper alignment of the attached traffic device and to prevent rotation around the
vertical axis or misalignment after installation.
Use studs that are either cast directly into the aluminum during the casting process
or tapped and locked with a locking material. In each case, a pull-out force must be provided.
Messenger wire clamps must be extruded aluminum six inches long or cast U-bolt type.
Torque specifications must be included for all fastening hardware with the
assembly installation instructions.
995-7.2Product Identification: Mounting assemblies must be permanently marked in
accordance with 995-1. Identification must be cast into, or metal-marked on, the assembly in a
legible manner. When the assembly is made up of multiple components, each component must
be identified with the manufacturer’s name or trademark.
995-7.3Finish: Unless otherwise specified, mounting assemblies and components must
be supplied with a natural finish with mill scale removed in accordance with Military Standard
MIL-PRF-24712A or AAMA 2603-02 and must meet the requirements of ASTM 3359 and
ASTM D3363. Disconnect (interior and exterior) and disconnect hub must be powder-coat
painted dull black (Federal Standard 595A-37038) with a reflectance value not exceeding
25 percent as measured by ASTM E97. All finished surfaces must have a smooth finish free
from cracks, blow-holes, shrinks, excessive material, and other flaws.
995-7.4Mast Arm Mounting Assemblies: Mast arm mounting assemblies must include
the following components: mast arm saddle, swivel, attachment cables (with cable clamp
mechanism) or bands. Unless the assembly uses a free-swinging mounting method, mast arm
mounting assemblies must include the support tube, and top and bottom support arms. Mast arm
mounting assemblies must be designed to be attached to a mast arm by cables or bands. All
connections must be designed to prevent movement when 250 pounds of downward force is
applied to the completed vehicular traffic signal assembly.
995-7.4.1 Saddle: Saddles must be aluminum or stainless steel and must have a
minimum yield strength of 16 ksi and a minimum ultimate tensile strength of 23 ksi in
accordance with ASTM B26, ASTM B108, ASTM B85 or ASTM A240.
995-7.4.2 Swivel: Swivels must be aluminum or stainless steel and must have a
minimum yield strength of 16 ksi and a minimum ultimate tensile strength of 23 ksi in
accordance with ASTM B26, ASTM B108, ASTM B85 or ASTM A240. The swivel must
provide at least two connection devices to secure the support tube to the swivel and be
configured to permit the support tube to provide adjustment in multiple directions in a plane
parallel to the mast arm. Any castings used to attach the support tube to the swivel must be
manufactured from the same alloy as the swivel.
995-7.4.3 Saddle Attachment Cables and Bands: Mast arm saddle attachment
cables must be 3/16-inch minimum diameter, Type 316 or 304 stainless steel aircraft type wire
strand cable. The swage at the ends of the cable (used to tighten the cable against the saddle)
must be Type 316 or 304 stainless steel with a minimum 3/8-inch diameter thread. The swage
must permit use of a wrench to prevent rotation while tightening the nut at the end of the swage.
If the attachment cable does not have swaged clamp screws at each end (double-ended), the
unclamped end of the cable must be sintered, welded, or otherwise secured without adhesives to
prevent unraveling of the cable. Banding must use two Type 304 or 201 series stainless steel 1223FY 2023-24Return to Table of Contents
3/4 inch wide bands and Type 316 stainless steel buckles (clamp screws). De-burr the edges of
the bands.
995-7.4.4 Cable Clamp Mechanism: Mast arm mount components used to
secure the cable to the saddle must be aluminum or stainless steel and must have a minimum
yield strength of 23 ksi and a minimum ultimate tensile strength of 30 ksi in accordance with
ASTM B26, ASTM B221, ASTM B85 or ASTM A240.
995-7.4.5 Support Tube: Support tubes used in mast arm mounting assemblies
must be aluminum or stainless steel and must have a minimum yield strength of 25 ksi and a
minimum ultimate tensile strength of 30 ksi in accordance with ASTM B221 or ASTM A240. A
gusseted hollow design may be used to provide for the routing of necessary wiring. The tube
cross-sectional area’s principal moments of inertia must average; at a minimum, that of a
1.5-inch standard aluminum Schedule 40 pipe and the cross-sectional metal area must not be less
than that of a 1.5-inch Schedule 40 pipe. The bottom portion of the tube that supports the vertical
load of the hanging device must be threaded using National Pipe Thread Taper (NPT), National
Pipe Thread Straight (NPS), non-threaded U-bolt secured, or a continuous arm support tube.
Threaded support tubes that are fully slotted must have an aluminum insert in the 3/4-inch slot
extending a minimum of 1/2-inch beyond the threaded section. To provide easy installation of
wiring, the tube must have a minimum 0.562-inch wire entrance slot running the full length of
the tube, or either stopping a minimum of 8 inches above the threaded or U-bolt secured end.
Edges of slot must be supported with internal gusseting. The tube interior and slot must be free
of sharp edges that may damage wiring. Provide an easily installed and removable UV stabilized
seal to completely fill the wire entrance slot after installation.
995-7.4.6 Top Support Arm: The top support arm of the mounting assembly
must be of one-piece solid construction, or continuous arm with support tube, and capable of
holding the signal head firmly in place. Top support arms must be aluminum with a minimum
ultimate tensile strength of 30 ksi and minimum yield strength of 18 ksi in accordance with
ASTM B26, or be die cast with a minimum ultimate tensile strength of 27 ksi and a minimum
yield strength of 24 ksi.
A one or two piece top arm is acceptable. For a one-piece top arm, use at
least two 1/4-inch minimum diameter Type 316 or 304 stainless steel set screws to secure its
position on the support tube. When a two-piece top arm is used, hardware required to connect
components of the top arm must be 3/8-inch minimum diameter, Type 316 or 304 stainless steel.
The top support arm must have three 1/4 inch - 20 UNC-2B threaded holes
to accept bolts for a tri-stud washer and gasket, or at least one imbedded or tapped and locked
5/16 inch - 18 threaded stud within the industry’s standard 72-tooth serrated circular design that
facilitates 5 degree increment positioning. Provide 0.090-inch thick (minimum) Type 316 or 304
stainless steel washers, nuts, and lock washers for attaching signal heads. A rubber washer, with
dimensions similar to the large stainless-steel washer, must be provided for traffic signals. When
mast arm clamps are used to support illuminated signs with tri-stud arrangements, a rubber
washer with dimensions similar to the steel washer must also be used.
995-7.4.7 Bottom Support Arm: The bottom support arm, when not continuous
arm with support tube, must be hollow to allow the routing and enclosing of all signal wiring.
Bottom support arms must be aluminum with a minimum ultimate tensile strength of 30 ksi and
minimum yield strength of 18 ksi in accordance with ASTM B26, or be die cast with a minimum
ultimate tensile strength of 27 ksi and a minimum yield strength of 24 ksi. Plastic bottom arm 1224FY 2023-24Return to Table of Contents
covers must be constructed of ABS with a UV inhibitor and be strong enough to contain the
signal cable in the bottom arm cavity without bending during installation and warping over time.
The end of the bottom support arm that attaches to the support tube must
have a 1.5-inch steel coupling imbedded and cast directly into the part during the solidification of
the aluminum, or a 1-1/2 inch NPT or NPS pipe thread cut directly into the casting. For non-
threaded versions, the arm must allow the support tube to sit a minimum of 2 inches into an arm
pocket and be secured to the arm with minimum 5/16-inch full U-shape U-bolt to distribute the
load evenly to the lower arm casting.
The end of the bottom support arm that connects to the signal must have
either three equally spaced and plumb imbedded 5/16-inch Type 316 or 304 stainless steel
threaded studs located in the center of the 72-tooth serrated circular design, or three 1/4 inch – 20
UNC-2B tapped holes to accept bolts for a tri-stud washer.
995-7.4.7.1 Arms with Steel Coupling: If a threaded steel coupling is
imbedded into the casting, the bottom arm must be aluminum alloy 535.0-F in accordance with
ASTM B26, with a minimum ultimate tensile strength of 23 ksi, meeting all standards listed in
ASTM B26, including chemical composition listed in Table 1 and material mechanical
properties listed in Table 2. The end of the bottom support arm must have at least two 1/4-inch
diameter Type 316 or 304 stainless steel set screws to secure its position on the support tube.
995-7.4.7.2 Threaded Arms: If threads are cut directly into the casting,
the bottom arm must be aluminum alloy 535.0-F in accordance with ASTM B26, with a
minimum ultimate tensile strength of 35 ksi and elongation of 9.0% in a 2-inch section, meeting
all standards listed in ASTM B26, including chemical composition listed in Table 1 and material
mechanical properties listed in Table 2. As an alternative, the arm can be die cast in aluminum
with a minimum ultimate tensile strength of 27 ksi and a minimum yield strength of 24 ksi. The
end of the bottom arm must have at least two 1/4-inch minimum diameter Type 316 or 304
stainless steel set screws to secure its position on the support tube.
995-7.4.7.3 Non-threaded Arms: Lower arm must be aluminum 356
having a minimum ultimate tensile strength of 30 ksi and meeting all standards listed in
ASTM B26, including chemical composition listed in Table 1 and material mechanical
properties listed in Table 2. The arm must have a locator tab to receive the support tube and be
secured by a U-bolt.
995-7.4.7.4 Continuous Arm Support Tube: The continuous arm
support tube must be of single form construction to support the weight of any combination of
signal indicators with all accessories such as backplates and visors. Continuous support tubes
must be Type 316 or 304 stainless steel with a minimum ultimate tensile strength of 75 ksi and a
minimum yield strength of 30 ksi in accordance with ASTM A554, or aluminum with a
minimum yield strength of 25 ksi and a minimum ultimate tensile strength of 30 ksi in
accordance with ASTM B221.
The continuous arm support tube attachment to the signal head
must have a minimum of two 5/16-18 Type 316 or 304 stainless steel bolts, nuts and washers. A
rubber seal must be provided between the support tube and signal head.
995-7.5Span Wire Mounting Assemblies: Span wire mounting assemblies must
include a span wire clamp, a hanging device such as a drop pipe, adjustable hanger, or adjustable
pivotal hanger with extension bar, messenger clamp, disconnect hanger, and multi-brackets. 1225FY 2023-24Return to Table of Contents
995-7.5.1 Span Wire Clamp: Span wire clamps must be aluminum or stainless
steel and must have a minimum ultimate tensile strength of 32 ksi and minimum yield strength of
22 ksi in accordance with ASTM B28, ASTM B108, ASTM B85, or ASTM A240.
995-7.5.2 Drop Pipe: Drop pipe hangers must be galvanized 1.5-inch steel
aluminum having a minimum yield strength of 35 ksi and a minimum ultimate tensile strength of
42 ksi in accordance with ASTM B221 and have NPT on each end for assembly.
995-7.5.3 Aluminum Adjustable Hanger: Aluminum adjustable hangers must
be aluminum alloy 535.0-F in accordance with ASTM B26 with a minimum ultimate tensile
strength of 35 ksi and elongation of 9.0% in a two-inch section, meeting the chemical
composition listed in Table 1 and material mechanical properties listed in Table 2 in ASTM B26.
995-7.5.4 Stainless Steel Adjustable Hanger: Stainless steel adjustable hangers
must be Type 316 or 304 stainless steel with a minimum ultimate tensile strength of 75 ksi and a
minimum yield strength of 30 ksi in accordance with ASTM A276.
995-7.5.5 Aluminum Adjustable Pivotal Hanger: Aluminum pivotal hangers
must be aluminum alloy 535.0-F in accordance with ASTM B26 with a minimum ultimate
tensile strength of 35 ksi and elongation of 9.0% in a two-inch section, meeting the chemical
composition listed in Table 1 and material mechanical properties listed in Table 2 in ASTM B26.
995-7.5.6 Stainless Steel Adjustable Pivotal Hanger: Stainless steel pivotal
hangers must be either Type 316 or 304 stainless steel with a minimum ultimate tensile strength
of 75 ksi and a minimum yield strength of 30 ksi in accordance with ASTM A276.
995-7.5.7 Aluminum Extension Bar: Extension bars used to extend the length of
the adjustable hanger must be T6061-T6 extrusion aluminum having a minimum yield strength
of 35 ksi and a minimum ultimate tensile strength of 42 ksi in accordance with ASTM B221.
995-7.5.8 Stainless Steel Extension Bar: Stainless steel extension bar used to
extend the length of adjustable hangers must be Type 316 or 304 stainless steel with a minimum
ultimate tensile strength of 75 ksi and a minimum yield strength of 30 ksi in accordance with
ASTM A276.
995-7.5.9 Disconnect Hanger: The disconnect hanger must be supplied with the
following as a minimum:
600 VAC Root Mean Square (rms) with 12 or 18 circuits. The terminal block must be easily
accessible for connection of the field wiring. Attach the terminal block to the disconnect with
Type 316 or 304 stainless steel or brass fastening hardware.
disconnect hanger to prevent insect and animal access and to protect the signal cable from
chafing.
serrated area (or 1.5-inch NPT threaded top section) to interface with the hanger method
employed above it.
securing device must be Type 316 or 304 stainless steel and captive. Hinge or groove pins for the
door must be Type 316, 304, 303, or 302 stainless steel.
995-7.5.10 Multi-Brackets: Top and bottom (multi) brackets used in the
assembly of span wire mounted multi-directional signals must be constructed of aluminum
having a minimum yield strength of 13 ksi and a minimum ultimate tensile strength of 23 ksi per
ASTM B26. 1226FY 2023-24Return to Table of Contents
Top brackets must be of one-piece hollow design, with a cross-sectional
diameter of at least 1-1/2 inch I.D. for receiving signal wires. The wall thickness must be at least
3/16 inch. Each top bracket (2-way, 3-way, and 4-way) must have a two-inch diameter hole (with
integral serrated boss as specified above) in the top side of the bracket for receiving a 1-1/2 inch
entrance fitting. The underside of the top bracket must have a covered hole of at least three
inches in diameter for the installation of the signal wires.
Bottom brackets must be of one-piece solid construction and must hold the
signal heads firmly in place.
For the five-section cluster configuration, provide 3/8-inch-thick Type 316
or 304 stainless steel tri-stud washers and nylock nuts with lock washers to secure the top and
lower signal sections of the cluster to the top multi bracket. Washer distortion must not occur
after assembly of the five-section cluster. Multi-brackets must include all fastening hardware
necessary to attach to the signal.
995-7.6Pole (Pedestal and Post) Mounting Assemblies: All trunnions, brackets, and
suspensions used in mounting vehicular and pedestrian signals to concrete, steel, aluminum, or
wood poles must be an aluminum alloy cast fitting, pipe or equivalent as approved by the
Engineer. The aluminum alloy must have a minimum ultimate tensile strength of 35 ksi in
accordance with ASTM B221, ASTM B85, or ASTM B26.
Pole side-mount brackets used for pedestrian signals may be constructed of
polycarbonate material.
995-7.7Mounting Assemblies for Signs, Cameras, Detectors, and Other Traffic
Control Devices: Mounting assemblies or assembly components used for signs, cameras,
detectors, and other traffic control devices must be constructed of the same material and meet the
same mechanical and chemical properties as mounting assemblies for signals.
995-7.8Miscellaneous Mounting Components: Miscellaneous mast arm, span wire,
and pole mounting components and accessories included with assemblies must meet the
mechanical properties for its associated main assembly components or be listed separately on the
APL. Mounting assemblies not approved with a specific primary device (such as a camera,
detector, etc.), must be approved and listed separately on the APL.
995-8Signal Priority and Preemption Systems
995-8.1General:
Signal priority and preemption system equipment may utilize optical, GPS, and
radio frequency technologies.
995-8.2Functional Requirements: Ensure that in-vehicle equipment operates without
requiring any action from the vehicle operator or occupants once power is applied.
995-8.2.1 Security: The system must include features that secure the system and
restrict its configuration and operation to authorized users and vehicles only.
995-8.2.2 Vehicle Identification: The system must be able to assign a unique
identifier for each authorized vehicle. The system must be able to associate the identifier with
vehicle information such as vehicle classification (e.g., fire, police, rescue, transit),
owner/operator, and priority level.
995-8.2.3 Configuration and Management: The system must allow authorized
local and remote users to set and read all user-programmable features and retrieve data collected
by the system. The manufacturer must provide computer software required to configure, operate,
and maintain the system at no additional cost to the Department. 1227FY 2023-24Return to Table of Contents
995-8.2.4 Logging: The system installed in the field cabinet must store a record
of events, including time, vehicle ID, class, priority level, and approaching direction for all
vehicles detected. The log must operate on a first-in, first out (FIFO) principle with a minimum
capacity of 5,000 events.
995-8.2.5 Detection Range and Accuracy: The priority and preemption system
must be capable of detecting and identifying multiple authorized vehicles at various ranges up to
2,500 feet. The system must be able to determine the approaching direction of authorized
vehicles. The detection range and programming of emergency (high priority) and transit signal
(low priority) preemption shall be adjustable from within the traffic signal cabinet. High priority
calls must override low priority calls.
The system must service preemption calls having equal priority on a first-
come, first-served basis.
995-8.3Preemption System Cabinet Electronics: The priority and preemption system
must be compatible with NEMA TS 1, NEMA TS 2, Type 170, and Type 2070 traffic signal
controllers and their respective cabinets.
The system must be able to provide calls to the controller via input file and
detector rack. The system must include two channel or four channel detector card units
compatible with NEMA TS 2-2003 v02.06. The system must include a shelf mount option.
The system must be able to provide emergency preemption (high priority) and
transit signal (low priority) preemption calls to the controller. Detectors must include
programmable timers that allow the operator to configure detector call extension as well as limit
the length of channel output calls.
Channel outputs must deliver a constant signal while emergency vehicles are
detected for high priority preemption activation. Channel outputs must deliver a pulsed output
for low priority preemption activation. Inputs and outputs must be optically isolated.
995-8.3.1 Serial Interface: Ensure that the serial ports support data rates up to
115 kbps; error detection procedures utilizing parity bits (i.e., none, even, and odd); and stop bits
(1 or 2). Serial interface ports may utilize RJ-45 connectors, D-sub connectors, or screw
terminals.
995-8.3.2 Network Interface: Ensure that LAN connections support the
requirements detailed in the IEEE 802.3 Standard for 10/100 Ethernet Connections. Ensure that
the connector complies with applicable TIA requirements.
995-8.4Optical Preemption Detectors: Optical preemption detectors must respond to
light impulses generated from a visible or infrared light source.
995-8.5Intersection Radio/GPS Modules: Radio/GPS preemption systems must
include radio/GPS modules that transmit a beacon signal and receive data transmitted by
Radio/GPS vehicle equipment.
995-8.6Mechanical Specifications: Ensure that every conductive contact surface or pin
is gold-plated or made of a noncorrosive, conductive metal. Do not use self-tapping screws on
the exterior of the assembly.
All external parts must be made of corrosion-resistant materials, such as plastic,
stainless steel, anodized aluminum, brass, or gold-plated metal.
Detector cards must include indicators for power and vehicle detection. Detector
cards must include a test switch that can be used to manually generate detector calls that the
system provides during normal operations. 1228FY 2023-24Return to Table of Contents
995-8.7Electrical Specifications: Provide equipment that operates on a nominal voltage
of 120 volts VAC. If the device requires operating voltages of less than 120 VAC, supply the
appropriate voltage converter.
995-8.8Environmental Specifications: Ensure system electronics perform all required
functions during and after being subjected to the environmental testing procedures described in
NEMA TS 2, Sections 2.2.7, 2.2.8, and 2.2.9. Detectors and detector connections that are
exposed to the elements must be weatherproof and designed for outdoor use.
995-9Pedestrian Detection System
995-9.1General: The components of the pedestrian detection system include
pushbuttons, pedestrian actuation signs, electronics, wiring, and mounting hardware.
995-9.2Standard Pedestrian Pushbutton Detector: Pushbuttons must be raised from
or flush with their housings and be a minimum of 2 inches in the smallest dimension. The
pushbutton must require no more than 5 pounds of force to activate. The detector must be
weather-tight and tamper resistant.
995-9.2.1 Housing: The housing must be a two-piece unit consisting of a base
housing and a removable cover. The housing must be cast aluminum meeting the physical
characteristics and chemical content established in ASTM B26 for alloys S5A and CS72A.
The housing or adapter (saddle) must conform to the shape of a pole and
provide a flush, secure fit. Saddles must be of the same material and construction as the housing.
Pushbuttons for wood pole mounting must have threaded holes for 1/2-inch conduit provided in
the housing top or bottom. A 3/4-inch hole with an insulated bushing shall be provided through
the back of the housing. Unused openings shall be closed with a weatherproof closure and
painted to match the housing.
The housing must have a powder-coat finish and painted in accordance
with Military Standard MIL-PRF-24712A.
995-9.2.2 Pushbutton: The pushbutton must include a normally open,
mechanical phenolic enclosed, positive-acting, spring-loaded, audible (i.e., click) snap-action
switch with single pole, single throw contacts, or a Piezo driven solid state switch rated for a
minimum of 50 V. The Piezo driven solid state switch, when activated, must give an audible
(i.e., two-tone chirp) indication of actuation. A visual indication of actuation is optional. The
visual indication must remain illuminated until the pedestrian’s WALKING PERSON
(symbolizing WALK) signal indication is displayed. Switch connections inside the housing must
allow wiring and installation without binding. The switch must have a design life of one million
operations (minimum) at rated load.
995-9.2.3 Electrical Requirements: The wiring must be No. 18 AWG stranded
995-9.3Accessible (Audible/Tactile) Pedestrian Pushbutton Detector: The accessible
pedestrian pushbutton detector must consist of all electronic control equipment, wiring,
mounting hardware, pushbuttons, and pedestrian actuation signs designed to provide both a
pushbutton with a raised, vibrating tactile arrow on the button as well as a variety of audible
indications for differing pedestrian signal functions.
995-9.3.1 Electronic Control Equipment: The accessible pedestrian pushbutton
detector must include electronic control equipment that is programmable and adjustable using a
laptop computer or vendor supplied programmer. Electronic control equipment must be able to
be installed within a traffic controller cabinet or within a pedestrian signal housing. Electronic
control equipment installed within a traffic controller cabinet must allow the use of up to 1229FY 2023-24Return to Table of Contents
16 pushbuttons (4 maximum per channel) with a single traffic controller cabinet. The accessible
pedestrian pushbutton detector must receive timing from Walk and Don't Walk signals.
995-9.3.1.1 Audible Messages: Audible messages must be
programmable. All audible messages and tones must emanate from the accessible pedestrian
pushbutton housing. The accessible pedestrian pushbutton detector must utilize digital audio
technology. The system shall have, at a minimum, three programmable locator tones. The
accessible pedestrian pushbutton detector must have independent minimum and maximum
volume limits for the Locator Tone, Walk, and Audible Beaconing features. The Wait message
must only annunciate once per actuation.
995-9.3.1.2 Pushbutton locator tone: The accessible pedestrian
pushbutton detector must provide independent ambient sound adjustment for the locator tone
feature. The accessible pedestrian pushbutton detector must allow the locator tone to be
deactivated.
995-9.3.1.3 Vibrating Pushbutton (VPB): The accessible pedestrian
pushbutton detector must include a Vibrating Pushbutton (VPB). The VPB must be a single
assembly containing an ADA compliant, vibro-tactile, directional arrow button, weatherproof
audible speaker, and pedestrian actuation sign with optional placard Braille messages. The VPB
tactile arrow must be 2 inches in length, be field adjustable to two directions, and require no
more than 5 pounds of applied force to activate.
995-9.3.1.4 Conflict Monitoring: The accessible pedestrian pushbutton
detector must monitor the Walk condition for conflict operation. The accessible pedestrian
detector system must disable the Walk functionality if a conflict is detected.
995-9.3.1.5 Cabinet Control Unit (CCU): The accessible pedestrian
pushbutton detector may include a CCU for interfacing and connecting the system. The CCU
shall have labeled LED indicators for each channel operation. The CCU must reset upon loss of
internal communication.
995-9.3.2 Inputs and Outputs: All inputs and outputs must use Mil-Spec Multi-
pin connectors.
995-9.3.2.1 Inputs: Walk and Don’t Walk inputs must be optically
isolated 80-150 volts AC/DC, 5mA max. General purpose inputs must be optically isolated 10-
36 volts AC/DC, 10mA max.
995-9.3.2.2 Outputs: Outputs must be optically isolated 36 volts AC/DC
peak, 300mA solid state fused contact closures. CCUs must include a normally open relay
contact fault output.
995-9.3.3 Communication: The CCU must include an Ethernet interface. The
CCU must have an integral web server that provides information on audible/tactile pedestrian-
pushbutton detector status, access to event logs, and provides for remote Configuration of
accessible pedestrian pushbutton detector system options. VPBs must include an Ethernet, serial,
USB, or Bluetooth programming interface.
995-9.4Passive Detectors: The passive detector must consist of all electronic control
equipment, wiring, and mounting hardware.
995-9.4.1 General: A passive detector system uses one or more sensors and
analytics hardware and software to detect the presence and direction of pedestrians and activate
the traffic control device without any required action by the pedestrian.
995-9.4.2 Configuration and Management: Ensure that the passive detector is
provided with software that allows local and remote configuration and monitoring. Ensure that 1230FY 2023-24Return to Table of Contents
the system can display detection zones and detection activations overlaid on live passive detector
inputs. Ensure that the passive detector allows a user to edit previously defined configuration
parameters, including size, placement, and sensitivity of detection zones.
Ensure that the passive detector retains its programming in nonvolatile
memory. Ensure that the detection system configuration data can be saved to a computer and
restored from a saved file. Ensure that all communication addresses are user programmable.
995-9.4.3: Solid State Detection Outputs: Ensure outputs meet the requirements
of NEMA TS2-2021, 6.5.2.26.
995-9.4.4: Electrical Requirements: Ensure the system operates using a nominal
input voltage of 120 VAC. Ensure that the system will operate with an input voltage ranging from
89 to 135 VAC. If a system device requires operating voltages other than 120 VAC, supply a
voltage converter.
995-9.5Electrical: All wiring must meet applicable NEC requirements. The accessible
pedestrian pushbutton detector must operate using a nominal input voltage of 120 VAC. If any
device requires nominal input voltage of less than 120 VAC, furnish the appropriate voltage
converter.
Accessible pedestrian pushbutton detector control electronics that are mounted in
a pedestrian signal head must be able to receive power from the Walk and Don’t Walk circuits of
the signal head. Control electronics shall not require more than four wires for each pushbutton
connection, and no more than two wires for each controller pedestrian input. Voltage at the
pushbutton shall not exceed 24 VAC.
995-9.6Mechanical: Do not use self-tapping screws on the exterior of the assembly
Ensure that all parts are made of corrosion-resistant materials, such as plastic,
stainless steel, anodized aluminum, brass, or gold-plated metal. Ensure that all assembly
hardware, including nuts, bolts, external screws and locking washers less than 5/8-inch in
diameter, are Type 304 or 316 passivated stainless steel. Stainless steel bolts, screws and studs
must meet ASTM F593. Nuts must meet ASTM F594. All assembly hardware greater than or
equal to 5/8-inch in diameter must be galvanized. Bolts, studs, and threaded rod must meet
ASTM A307. Structural bolts must meet ASTM F3125, Grade A325.
Enclosures must have a NEMA 4X rating. Pushbutton housings for intersections
must be black.
995-9.7Environmental: Ensure equipment performs all required functions during and
after being subjected to the environmental testing procedures described in NEMA TS2-2021,
Sections 2.2.7, 2.2.8, and 2.2.9.
995-10Traffic Controllers
Traffic controllers must meet the industry standards in Table 995-6.
Table 995-6
Traffic Controller Standards
Device Standard
NEMA TS2 Controller NEMA TS2-2021
Model 2070 Controller CALTRANS TEES, 2020
Note: All controllers must meet AASHTO/ITE/NEMA ATC 5201, v06.25.
All controllers must provide functionality that meets or exceeds operational
characteristics, including NTCIP support, as described in NEMA TS2-2021.
All controllers must: 1231FY 2023-24Return to Table of Contents
1.Capture all mandatory event-based data elements listed in supplemental
requirement SR-671-2, Supplemental Traffic Controller High Resolution Data Logging
Requirements, as published on the Department’s State Traffic Engineering and Operations Office
website at the following URL: https://www.fdot.gov/traffic/Traf-Sys/Product-
Specifications.shtm.
Traffic Signal Controller Broadcast Messages (TSCBM) to local agencies and FDOT that are
compatible with SAE J2735 2016-03.
controller front panel for interface with Roadside Units (RSU) and other devices or systems.
995-11Traffic Cabinets
995-11.1General: Cabinets must be permanently marked with a label including the
manufacturer's name or trademark, model/part number, and the year and month of manufacture.
Place the label on the inside of the main door using a water-resistant method. The label must be
visible after installation.
Painted and unpainted cabinets must meet the applicable requirements in
Aluminum Cabinets, NEMA TS-2-2016, 7.7.2.
995-11.2NEMA Traffic Signal Controller Cabinets: Provide NEMA traffic signal
controller cabinets with all terminals and facilities necessary for traffic signal control meeting the
following requirements:
NEMA TS1 Controller Cabinet NEMA TS-1-1989
NEMA TS2 Controller Cabinet NEMA TS 2 2016
995-11.2.1 Documentation: Provide four paper copies of the cabinet wiring
diagram with each cabinet. The nomenclature of signal heads, vehicular movements and
pedestrian movements on the wiring diagram must be in accordance with the signal operating
plan.
Documentation must include a list identifying the termination points of
cables used for vehicular and pedestrian signal heads, detector loop lead-ins, and pedestrian
pushbutton wires.
A heavy duty, resealable plastic opaque bag must be mounted on the
backside of main cabinet door for storing cabinet documentation.
995-11.2.2 Police Switches: Provide the following police switches with Type 3
and larger controller cabinets. The switches must be mounted on the police panel and identified
as to their function.
indications must immediately transfer to the flashing mode. AC power shall be removed from the
load switches and stop timing applied to the controller unit. When this switch is placed in the
AUTO position the controller unit must operate in accordance with the appropriate specification.
ground must be applied to the manual control enable input of the controller unit.
must mate with a three circuit, 1/4 inch diameter phone plug. Connect the tip and ring (middle)
circuits of the jack to the logic ground and the interval advance inputs of controller unit. When
the manual hand cord is plugged into the jack and the pushbutton is pressed, logic ground must
be connected to the interval advance input of the controller unit. 1232FY 2023-24Return to Table of Contents
Provide a manual pushbutton with Type 3 and larger cabinets. The pushbutton
cord must have a minimum length of six feet with a 1/4 inch diameter three circuit plug
connected to one end and a hand held manual pushbutton at the other end. With the exception of
the vehicular yellow and all red clearance intervals, a complete cycle (push-release) of the
manual pushbutton shall terminate the controller unit interval that is active. Cycling the push-
button during the vehicular yellow or all red clearance intervals must not terminate the timing of
those intervals.
995-11.2.3 Service Switches: Service switches must be mounted on the service
panel or other locations approved by the Department and identified as to their functions. Provide
the following service switches with Type 3 and larger cabinets.
shall be removed from all signal heads. The SIGNALS ON-OFF switch must be connected to the
control input of a contactor (displacement relay). Current supplied to the switch must not exceed
five amperes (amps) total. Do not directly route the main signal head power bus and cabinet
power through the service or police switches.
indications must transfer to the flashing mode in accordance with the Uniform Code Flash (UCF)
requirements. AC power shall be removed from the load switches when the signal indications
transfer to the flashing mode. The controller unit must operate in accordance with appropriate
specifications during the flashing mode. When the switch is placed in the AUTO position,
transfer from the flash mode to normal operation shall be made in accordance with UCF
requirements.
power shall be removed from the controller.
power shall be removed from all circuits of the cabinet except for the duplex receptacle, cabinet
light and ventilation fan.
each phase of the controller unit. Detector test switches must include a position for normal
operation (phase receives calls from detectors), a position that provides a constant call, and a
position that provides a momentary call.
995-11.2.4 Doors and Locks: Provide Type 3 and larger cabinets with a hinged,
rain tight and dust tight police door which allows access to the police switches and manual jack.
Locate the police door in the bottom half of the main door for Type 3 and
4 pole mount cabinets. Locate the police door in the upper half of the main door for Type 4 and
larger base mount cabinets.
Hinges and hinge pins must be constructed of stainless steel and prevent
the door (main or police) from sagging. Hinges for the main and police doors must be 14 gauge
and be located on the right side (viewed from the front).
Type 3 and larger cabinets must be furnished with a three point draw roller
latching system consisting of the following latching points:
1233FY 2023-24Return to Table of Contents
The latching points on the top and bottom of the cabinet must remain in
the locked position until the main cabinet door lock is unlocked. The locking mechanism must be
equipped with nylon rollers to secure the top and bottom of the door.
Type 3 and larger cabinets must be furnished with a door stop which
retains the main door open in a 90 degree and 120 degree position.
995-11.2.5 Police and Service Panels: Provide a police service panel with
Type 3 and larger cabinets. The panels may be constructed of either sheet aluminum or cast
aluminum. Locate the police panel behind the police door attached to the main door. The service
panel must be mounted on the back side of the police panel. The police panel must have the
following minimum dimensions:
995-11.2.6 Ventilation: Type 1 and 2 cabinets must be vented to allow
dissipation of the heat generated by the equipment housed inside the cabinet.
Type 3 and larger cabinets must have dual, UL listed, thermostatically
controlled fans, rated for continuous duty with a service life of at least three years. Mount
thermostats on the inside top of the cabinet. Thermostats must be user adjustable to allow
temperature settings ranging from a minimum of 70°F to a maximum of 140°F and capable of
activating the fans within plus or minus 5 degrees of the set temperature. The intake vent must be
rain tight, located on the bottom half of the cabinet, and covered with a removable filter.
995-11.2.7 Shelves: Type 2 cabinets must be furnished with one shelf. Type 3 and
larger cabinets must be furnished with two adjustable shelves. Shelves must be adjustable in a
maximum of 2-inch increments from the top of the load panel to 12 inches from the top of the
controller cabinet.
995-11.2.8 Mounting Hardware: Type 1, 2, and 3 cabinets must be supplied
with hardware for attaching the top and bottom half of the cabinet onto a flat or round surface.
Optional wall or pole mount hardware must be provided for mounting Type 4 cabinets in specific
installations.
Type 4 cabinets must have rigid tabs attached to the bottom of the cabinet.
Type 5 cabinets must have rigid brackets attached to the bottom of the cabinet. Rigid brackets
and tabs must be constructed of the same material used for the cabinet.
Type 4 and larger cabinets must be provided with one of the following
alternatives for fastening to a concrete base:
accordance with ASTM A153. The anchor bolts must be at least 1/2 inch in diameter, seven
inches in vertical length with at least three inch horizontal, or
and machine screws with at least 1/2 inch thread diameter.
995-11.2.9 Electrical: Fabricate ground busbars of copper or aluminum alloy
material compatible with copper wire and provide at least two positions where No. 2 AWG
stranded copper wire can be attached.
Mount a ground busbar on the side of the cabinet wall adjacent to the
power panel for the connection of AC neutral wires and chassis ground wires.
If more than one ground busbar is used in a cabinet, a minimum of a
No. 10 AWG copper wire must be used to interconnect them. 1234FY 2023-24Return to Table of Contents
995-11.2.9.1 Wiring: All wiring must be laced. All conductors in the
cabinet must be stranded copper.
All inputs and outputs must be terminated on terminal strips. A
connector harnesses for the controller, conflict monitor, vehicle detectors, and other controller
accessory equipment must be furnished and wired into the cabinet circuitry.
A vehicle detector harness or rack must be furnished with the
cabinet. Terminal strip circuits must be provided for connection of the loop lead-in cable.
995-11.2.9.2 Terminal Strips: The voltage and current rating of terminal
strips must be greater than the voltage and current rating of the wire which is terminated on the
terminal strip.
Conductors must be terminated on terminal strips with insulated
terminal lugs. A calibrated ratchet crimping tool must be used to terminate the conductor in the
terminal lug.
When two or more conductors are terminated on field wiring
terminal strip screws, a terminal ring lug shall be used for termination of those conductors. All
terminal strip circuits must be numbered.
995-11.2.9.3 Cabinet Light and Receptacle: For Type 3 and larger
cabinets, provide one or more light fixtures that illuminate the entire interior of the cabinet. All
lighting fixtures must automatically turn on when the cabinet doors are opened and off when the
doors are closed.
Mount and wire a three-wire 115 VAC duplex receptacle in all
cabinets. The receptacle must be protected by a 15A circuit breaker. Do not mount the receptacle
on the main cabinet door or police and service switch panels.
995-11.2.9.4 Main Circuit Breaker: Provide a 15A circuit breaker with
Type 1 and 2 cabinets, and a 30A circuit breaker with Type 3 and larger cabinets.
The main circuit breaker must turn off all power to the cabinet and
shall not be used for the power switch located in the service panel.
995-11.2.9.5 Radio Interference Suppression: A radio interference
suppressor must be provided in series with the AC power before it is distributed to any
equipment inside the cabinet. The suppressor must provide a minimum attenuation of 50 decibels
over a frequency range of 200 kHz to 75 MHz when used with normal installations and shall be
hermetically sealed in a metal case.
The radio interference suppressor must have the same minimum
current rating as the main circuit breaker.
The ground connection of the radio interference suppressor must
be connected only to AC neutral and shall not be connected to earth ground directly.
995-11.2.9.6 Optically Isolated Inputs: The Opto common input is the
common reference pin for four optically isolated inputs.
The Opto inputs are intended to provide optical isolation for
pedestrian detector and remote interconnect inputs. The Opto inputs are intended to connect
through external 27 K ohm, 1 W resistors for 120 VAC operation and are intended for direct
connection to 12 VAC from the cabinet power supply for pedestrian detector applications. These
inputs may alternatively be used for low-true DC applications when the Opto common pin is
connected to the 24 V supply.
The Opto inputs shall provide electrical isolation of 10 megohms
minimum resistance and 1000 VAC RMS minimum breakdown to all connector pins except the 1235FY 2023-24Return to Table of Contents
Opto common pin. These inputs shall exhibit nominal impedance to the Opto common pin of 5 K
ohm, plus or minus 10 percent, and shall require 2.4 mA, plus or minus 10 percent, from a
nominal 12 VAC supply. The Opto inputs shall not recognize 3 VAC RMS or less relative to the
common input and recognize 6 VAC RMS or more relative to the common input. Any steady state
voltage applied between an Opto input and the Opto common shall not exceed 35 VAC RMS.
Opto inputs shall not be acknowledged when active for 25 ms or less, and shall be acknowledged
when active for 50 ms or more.
995-11.2.9.7 Load Resistors: A load resistor or capacitor must be
installed between the AC (common) and each signal field wiring terminal for the yellow, green
and walk indication. All load resistors and capacitors must be on the front side of any panel used
in the cabinet.
995-11.2.9.8 Surge Protection: Furnish surge protective devices (SPDs)
for the main AC power input, all signal head field wiring terminals, interconnect cable terminals
and loop lead-in cable terminals which are located in the cabinet. SPDs must be unobstructed and
accessible from the front side of any panel used in the cabinet. Cabinets utilizing Din rail
mounted SPDs must be grounded with a conductor to the cabinet busbar.
The SPD for the main AC power input of the cabinet must be
connected on the load side of the cabinet circuit breaker.
SPDs for signal and interconnect cable field wiring terminals must
meet the following:
the peak operating voltage of the circuit being protected.
waveform six times (at 1 second intervals between surges) without damage to the suppressor.
SPDs for loop lead-in cables must be designed in accordance with
the following requirements:
(between the loop lead) surges, and against common mode (between loop leads and ground)
surges.
to repetitive 300A surges.
waveform without damage.
SPDs must be installed according to the SPD manufacturer’s
instructions and not affect the operation of detectors. SPD leads must be kept as short as
possible.
995-11.3Type 170 Traffic Signal Controller Cabinets: Provide Type 170 traffic signal
controller cabinets with all terminals and facilities necessary for traffic signal control and
meeting the following requirements:
Model 332, 334 and 336S Cabinets
CALTRANS TEES 2009
Model 336S cabinet must incorporate input surge protection mounted on a
fold-down termination panel at the input file.
Model 332 cabinets must incorporate a lower input termination panel.
Model 332 and 334 cabinets must be base mounted. The Model 332 cabinet must have an
auxiliary MODEL 420 output file, and be configured for 8 vehicle, 4 pedestrian, and 4 overlaps. 1236FY 2023-24Return to Table of Contents
Model 552A designation is given to Model 332 cabinet assemblies that
include a swing-out EIA 19-inch rack cage.
Model 662 designation is given to Model 552A cabinets with a 66 inch
height.
Cabinets must comply with figures for traffic control signals and devices
available on the Department’s State Traffic Engineering and Operations Office website at the
following URL:
https://www.fdot.gov/traffic/Traf_Sys/Product-Specifications.shtm.
All terminals and facilities on panels must be clearly identified using
permanent silk-screened text.
995-11.3.1 Base Plate and Mounting Brackets: Provide cabinets with a standard
base mounting bolt pattern and a minimum of two aluminum plates welded inside for anchoring
to a concrete or composite base.
995-11.3.2 Output File: Fabricate the output file using a "hard wired" harness.
Printed board circuit boards are not acceptable.
995-11.3.3 Shelf: Provide an aluminum shelf with storage compartment in the
rack below the controller (for remote secondary monitor/lap top computer use). The storage
compartment must have telescoping drawer guides for full extension. The compartment top must
have a non-slip plastic laminate attached. Provide an RS-232 connector for communications to
the C2S port.
995-11.3.4 Loads: Provide dummy loads consisting of 4.7k resistors rated at
five watts minimum for Greens, Peds, and Yellows. The dummy loads must be mounted on a
terminal block in the rear of the output file or other approved location. Wire one side of each
dummy load to AC return in a manner that allows a technician to easily attach the load to outputs
from selected load switches.
995-11.3.5 Cabinet Light: Provide one or more light fixtures that illuminate the
entire interior of the cabinet. All lighting fixtures must automatically turn on when the cabinet
doors are opened and off when the doors are closed.
995-11.3.6 Surge Protection: Provide each cabinet with devices to protect
equipment from surges. Surge protector termination panels must be attached to the cabinet rack
assembly and allow sufficient space for connections, access, and surge protector replacement.
AC isolation terminals must be on the same side of the cabinet as the AC service inputs. DC
terminals and loop detector terminals must be installed on the opposite side of the cabinet from
the AC power lines.
Surge protection for 332A cabinets must be mounted on the lower input
termination panel.
Surge protection for 336S cabinets must be mounted on a custom fold
down termination panel at the input file.
Under no circumstance (normal operation or short-circuit condition) shall
the amperage capacity of the internal wiring and printed circuit board traces be less than the
protecting threshold of circuit breakers and surge protectors provided.
995-11.3.6.1 Power Distribution Assembly Protection: The power
distribution assembly (PDA) SPD must be a two-stage series/parallel device that meets or
exceeds the following:
1237FY 2023-24Return to Table of Contents
8 microseconds and fall in 20 microseconds to one-half the peak: 20kA.
terminal, 10A)
equipment)
must be separated by a 200 microhenry (minimum) inductor rated to handle 10A AC service
terminals
and Equipment Neutral
metal oxide varistor (MOV) or similar solid state device, rated 20 kA.
The main neutral and equipment neutral output shall be connected
together internally and shall have an MOV (or similar solid state device, or gas discharge tubes)
rated at 20 kA between main neutral and ground terminals.
The PDA SPD must have a peak clamp voltage of 250V at 20 kA
(voltage measured between equipment line out and equipment neutral out terminals, current
applied between main line and ground terminals with ground and main neutral terminals
externally tied together).
The PDA SPD must have a maximum let through voltage not
exceeding 500 Vpk using an 8 by 20 μs/1.2 by 50 μs; 6 kV, 3 kA surge. The SPD must either be
epoxy-encapsulated in a flame retardant material or utilize thermally protected varistors and be
designed for continuous service current of 10A at 120 VAC RMS. Power to the Type 170E
controller and to the 24V power supply must be provided from the equipment line out terminal of
the PDA SPD.
995-11.3.6.2 Inductive Loop Detector Protection: Protect each inductive
loop detector input channel with an external SPD that meets or exceeds the following:
connected across the signal inputs of the detector. The third terminal shall be connected to
chassis ground to protect against common mode damage.
2.The SPD must instantly clamp differential mode surges (induced
voltage across the loop detector input terminals) via a semiconductor array. The array shall be
designed to appear as a very low capacitance to the detector.
between the loop leads and ground) via solid state clamping devices.
1238FY 2023-24Return to Table of Contents
995-11.3.6.3 Signal Load Switch Protection: The outputs of each load
switch in the output file shall be provided with a MOV connected from the AC positive field
terminal to the chassis ground. The MOV must be rated 150 VAC and shall be a V150LA20A (or
approved equal).
995-11.3.6.4 Communication Input Protection: Each low voltage
communication input must be protected as it enters the cabinet with a hybrid two-stage SPD that
meets or exceeds the following:
double-sided, gold-plated printed circuit board connector.
terminal block (PCB1B10A).
pairs. The data circuits must pass through the SPD in a serial fashion.
minimum)
The line side of the SPD must be connected to the communication
field wires, the load side connected to the communication connector of the controller, and the
ground terminal connected to chassis ground.
995-11.3.6.5 Low Voltage DC input protection: Each DC input must be
protected by an SPD that meets or exceeds the following:
connected to the line side of the low voltage pair, two terminals must be connected to the input
file side, and the fifth terminal connected to chassis ground.
(b)Peak Surge Current
2 kA (8 by 20 μs)
Occurrences at peak current: 100 (typical)
995-11.3.6.6 Preemption and 115V AC signal input protection: Each
preemption or AC signaling input channel must be protected by an external SPD that meets or
exceeds the following requirements:
1239FY 2023-24Return to Table of Contents
2000A (8 b 20 μs)
Occurrences at peak current: 25 (minimum)
995-11.3.7 Model 210 Conflict Monitor with Absence of Red Monitoring: The
conflict monitor must be a Model 210 "PLUS" conflict monitor capable of detecting fault
sequencing of signals on a per channel basis (i.e., short or absence of yellow interval and/or
simultaneous dual indications). All integrated circuits having 14 pins or more must be socket
mounted.
995-11.3.7.1 Absence of Red Monitoring: The conflict monitor must be
capable of monitoring for the absence of voltage on all of the inputs of a channel (defined here as
red, yellow, and green). If an output is not present on at least one input of a channel at all times,
the unit shall begin timing the duration of this condition. If this condition exists for less than
700 milliseconds, the unit shall not trigger. If this condition exists for more than
1000 milliseconds, the unit shall trigger as if a conflict had occurred, causing the intersection to
transfer immediately into a flashing mode, and "stop-time" to be applied to the controller. A red
signal shall require the presence of a minimum of 60 VAC, plus or minus 10 VAC, to satisfy the
requirements of a red indication. The red input signals shall be brought into the conflict monitor
through an auxiliary connector on the monitor's front panel. Provide a similar connector on the
output file, with a removable harness connecting the two. Provide an indicator on the front panel
of the monitor to identify the triggering of the monitor in response to the absence of red
condition.
995-11.3.7.2 Red Monitor Harness: A connector and terminal assembly
designated as P20 for monitoring the absence of red, shall be an integral part of the output file.
The connector must terminate, and be compatible with, the cable and connector of a Type 170
conflict monitor unit (CMU), capable of monitoring the absence of red. Provide the pin
assignments of the P20 connector and terminal assembly with the cabinet plans. The P20
connector shall be physically like the cable and connector of a Type 170 CMU to prevent the
absence of red cable connector from being inserted into the P20 connector 180 degrees out of
alignment.
995-11.3.7.3 Programming of Unused Red Channels: Provide all
cabinet assemblies with a means of programming unused red channels by installing jumpers
from red monitor inputs to 115 VAC. The connecting terminals for the jumpers must be accessible
and located in the same terminal block for all 16 channels to assure full compatibility of all
cabinet assemblies with "210 Plus" conflict monitor units.
995-11.3.8 Police Door and Panel: Provide cabinets with police doors and
panels. The police panel must include text informing officers that yellow and all-red clearance
intervals are timed internally.
Police switch panels must include a manual jack. The jack must mate with
a three circuit, 1/4-inch diameter phone plug. Connect the tip and ring (middle) circuits of the
jack to the logic ground and the interval advance inputs of controller unit. When the manual hand
cord is plugged into the jack and the pushbutton is pressed, logic ground must be connected to
the interval advance input of the controller unit.
The pushbutton cord must have a minimum length of six feet with a
1/4-inch diameter three circuit plug connected to one end and a hand held manual pushbutton at
the other end. With the exception of the vehicular yellow and all red clearance intervals, a 1240FY 2023-24Return to Table of Contents
complete cycle (push-release) of the manual pushbutton shall terminate the controller unit
interval that is active. Cycling the push-button during the vehicular yellow or all red clearance
intervals must not terminate the timing of those intervals.
995-11.3.9 Technician Service Panel: Provide cabinets with a technician service
panel which is mounted on the back side of the police panel (inside the main cabinet front door).
There must be two switches located on the technician service panel,
clearly labeled according to the following functions:
Place the intersection into Flashing Operation.
After meeting requirements for Flashing Operations, all
power shall be removed immediately from signal load switches.
to the signal lights through the use of a 60A contact switch placed in series with the load switch
packs.
Labels must be silk screened directly on the panel.
995-11.3.10 Swing-out Rack Assembly: Provide 552-A cabinets with a pullout
and rotatable rack assembly as well as an interface panel mounted on the top of the rack
assembly and attached to the top shelf. The rack assembly must be constructed to house
components designed to be installed in a standard EIA 19-inch rack and shall house the
Controller, Input File, Output File No. 1, PDA No. 2, and a storage compartment.
Construct the rack and slide/hinged mounting brackets so that when the
rack assembly (fully loaded) can be pulled out with one hand with complete ease of operation
including rotation of the assembly.
The rack assembly must have a spring-loaded latch mechanism to secure
the rack assembly inside the cabinet while in the "rest" position. When pulled out of the cabinet
at any point from its resting position (inside cabinet) to its full extension and rotation, the fully
loaded rack assembly shall not cause any member of the assembly to bend, warp or bind. The
rack must be made of one-inch square aluminum tubing with welded joints and extend and
retract smoothly without noticeable friction or stress on roller guides, extension brackets, or
other mechanical components. Maximum deflection of the entire rack assembly (with all
equipment installed) shall not exceed 1/8 inch.
The rack assembly must have 12 technician test switches mounted to the
interface frame assembly. Technician test switches must be of the momentary type and shall
have eight vehicle and four pedestrian inputs.
The front of the rack assembly must be tapped with 10-30 threads with
EIA universal spacing for 19-inch electrical equipment racks.
The rack assembly must be attached to the left cabinet wall through
combination slide/hinged mounting brackets.
The slide/hinged mounting brackets must be fabricated from aluminum
and/or stainless steel only.
Mounting bracket guides must utilize 7/8-inch stainless steel ball bearing
rollers and allow extension and retraction of a loaded rack with minimal effort.
The rack assembly must be capable of rotating 210 degrees from its rest
position after full extension from the cabinet. 1241FY 2023-24Return to Table of Contents
The rack assembly must have a minimum 7/16-inch diameter aluminum
rack stop rod attached to the inside left cabinet wall from the left side of the rack assembly to
lock the rack into final position.
All cabinet harnesses must be long enough to maintain cabinet
connections and functionality when the rack assembly is fully extended and rotated to its
maximum limit. Harnesses must not bind or crimp when the rack is fully retracted, extended, or
in motion.
995-11.3.11 Service Panels for 552A: The 552A cabinet must include a field
service panel, auxiliary field service panel, and interface panel, all constructed of aluminum with
a 1/8-inch minimum thickness. All components must be accessible from the front of the panels.
Do not mount components or attach wires behind panels.
995-11.3.11.1 Field Service Panel: The field service panel must consist
of terminal strips, circuit breakers, transient protection devices, load resistors, capacitors, cable
tie mounts and associated wiring for making all field wiring connections. Mount the field service
panel in the cabinet on the lower right exterior cabinet wall.
The field service panel must provide the necessary interconnecting
junction points between the rack assembly and cabinet for the field service wires. The panel must
be grouped for internal connections (jumpers) between terminals boards, wiring from the panel
to the rack assembly, and wiring from the panel to the cabinet.
The field service panel wiring harness must have flexible wire
covered by a flexible non-metallic conduit from the field service panel to the PDA, output file,
and interface panel. The harness must have a metal clamp with a rubber grommet center attached
to the field service panel to secure the harness to the panel for proper orientation of the harness
with the rack assembly. Terminal strips for the panel shall be as listed below:
No. 4 to No. 14 AWG wire range, 70A, 600V.
Density, 5-40 x 3/16 BH Screw, Open Bottom, Double Row, No. 16 AWG (max), 15A, 250V.
Density, 5-40 x 3/16 BH Screw, Open Bottom, Double Row, No 16 AWG (max), 15A, 250V.
.438 Density, 6-32 x 1/4 BH Screw, Open Bottom, Double Row, No. 14 AWG (max), 20A,
250V.
The panel must have a main cabinet circuit breaker rated at 30A
and a cabinet accessory circuit breaker rated at 15A for cabinet fans and light. Mount the circuit
breakers near the back cabinet door on the panel.
The panel must include load resistors for all Walk, Green, Green
Arrow, Yellow and Yellow Arrow Switch Pack outputs to prevent the conflict-voltage monitor
from going into "Flash" due to a failed signal lamp. Load resistors must be 2K, 10 watt.
MOVs must be physically tied to one side of each terminal on
TBS4 and TBS5 and be physically secured to the field service panel with a 6-32 screw.
995-11.3.11.2 Auxiliary Field Service Panel: The auxiliary field service
panel must be mounted on the lower left interior cabinet wall and consist of a minimum of four
terminal strips, 18 detector surge protectors and one pedestrian button isolation board assembly.
The 18 surge protectors must be a three-terminal device, two of which are connected across the
signal inputs of the detector for differential mode protection and the third terminal is grounded to 1242FY 2023-24Return to Table of Contents
protect against common mode damage. Mount the pedestrian button isolation board on the
auxiliary field service panel. Terminal strips for the panel shall be Terminal Block, Barrier,
12 position, .438 Density, 6-32 x 1/4 BH Screw, Open Bottom, Double Row, No. 14 AWG
(max), 20A, 250V.
Install a four-button pedestrian isolation board on the auxiliary
field service panel to provide for the connection of the pedestrian buttons on phases 2, 4, 6 and 8.
The board must provide electrical isolation of the field wiring to the internal cabinet wiring. The
inputs to this isolation board shall be wired to terminal block TBA5 for connection to field
wiring. The outputs of this board shall be carried through the harness to the input file to the
proper wires that go to the interface extension panel of the controller.
The pedestrian button isolation board must include a PC board
mounted on an aluminum panel with the following minimum dimensions:
Height: 2 inches
Width: 8 inches
Thickness: 1/8 to 3/16 inch
995-11.3.11.3 Interface Panel: The interface panel must consist of eight
terminal strips, one telephone line suppressor and mounting fixture, two 24 VDC relays and
mounting fixtures, and all associated wiring for connecting the required interface equipment
modules.
The front of the panel must be covered by a 1/4-inch clear
plexiglass sheet, supported from the panel by four 1-1/2 inch standoffs. Secure the panels and
cover using wing nuts that are removable without the use of tools. The plexiglass cover shall
have 1/2-inch slot, centered over each of the terminal strips. All covers and panels must be
interchangeable.
The panel wiring must provide the necessary interconnecting
junction points between interface equipment cable harnesses and controller cabinet input and
output signal. The panel wiring provides the functional wiring information for connecting the
interface equipment in the cabinet.
The panel wiring must be grouped for internal connections
(jumpers between terminal boards) as well as wiring from the controller and related cabinet
functions to the terminal boards on the interface panel.
Ground wires must be No. 14 AWG wire, minimum. The internal
harnesses must be located between TB1, TB2 and TB3. The external and internal wiring must be
located outside of TB1 and TB4, between TB2 and TB3.
Terminal strips shall be Barrier type, .375 Density, 5-40 x 3/16 BH
Screw, Open Bottom, Double Row, No. 16 AWG (max), 15A, 250V. Terminals must use
nickel/cadmium plated brass screws. All terminals and facilities on panels must be clearly
identified using permanent silk-screened
The K1P and K2F relays shall be 15A miniature relays with
polycarbonate cover, 2 form C (CO) contact arrangement, DC coil input, socket mount, .187 inch
quick connect/solder terminals, AgCdO (15A) contacts, and 24 VAC coil voltage with matching
socket and hold down spring. All screws on the relay socket must be brass with nickel/cadmium
plating.
995-11.3.12 Storage Compartment: Mount an aluminum storage compartment
in the rack assembly. The storage compartment must have telescoping drawer guides for full 1243FY 2023-24Return to Table of Contents
extension of drawer from rack assembly and have a continuous front lip for opening the
compartment top for storage. The top of the compartment must be non-slip plastic laminate.
Install a communication port on the right hand side of the drawer at the
front for connecting to the communications port of the controller unit via the cabinet harness.
995-11.3.13 Cabinet Rails: Provide the cabinet with four cabinet rails for
mounting wiring panels and various brackets. Rails must be keyhole design with slots 2 inches
on center with a top opening diameter of 5/8 inch to allow the insertion of a 5/8 inch by 1 inch
carriage bolt. The rails must be approximately 1-1/2 to 2 inches wide by 1/2 inch deep. Do not
use unistruts or other rails.
995-11.3.14 Electrical: Do not use printed circuit boards in any controller cabinet
subsystem file or panel, including but not limited to the output file (except for the red monitor
program board), service panel, interface panel, and input file.
995-11.3.14.1 Wiring: Cut all wires to the proper length and neatly laced
into cables with nylon lacing. No wire shall be doubled back to take up slack. Cables in the
cabinet must not interfere with the routing and connection of field wiring. Cables must be
secured with nylon cable clamps, unless specified otherwise. The position of cables between the
components must be such that when the door is closed, it does not press against the cables or
force the cables against the various components inside the controller cabinet.
Fabricate ground busbars of a copper or aluminum alloy material
compatible with copper wire and provide at least two positions where a No. 2 AWG stranded
copper wire can be attached. Mount a 6 inch ground busbar with screw terminals on the bottom
flange on each side of the cabinet for connection of AC neutral wires and chassis ground. Attach
a flexible ground strap between the left side ground busbar and the left side bottom rear of the
rack assembly. Wiring harnesses must be covered by a flexible non-metallic conduit. Panel wire
size must be a minimum of No. 18 AWG unless otherwise specified.
995-11.3.14.2 Terminals: Terminal connections must be soldered or
constructed using a calibrated ratchet type crimping tool. Wiring must be traceable and without
entanglement.
995-11.4Controller Cabinet Flashing Operation: When a non-emergency flashing
operation is required, the selected operation shall be performed by the UCF format. The
following shall utilize UCF format:
When flashing operation is initiated, the controller assembly shall transfer from
normal operation to flashing operation only at the end of the common major street red interval,
the common minor street yellow interval, or the all red interval.
UCF shall be an internal function of the controller unit and must not be inhibited
by the hold command. External logic will not be allowed to provide this function.
In the event of an emergency when flashing operation is required, the controller
assembly shall immediately place the intersection on flash. Emergency flash may be initiated by
the following:
error 1244FY 2023-24Return to Table of Contents
The transfer of the controller assembly from flashing operation to normal
operation shall cause the controller unit to revert to its start-up sequence unless the conflict-
voltage monitor has transferred the controller assembly to flashing operation. If transferred to
flashing operation by the conflict-voltage monitor, the controller assembly shall remain in
flashing operation until the monitor unit is reset and automatic operation can be implemented
through the normal start-up sequence.
995-11.5Intelligent Transportation System Cabinets: The cabinet shell must conform
to NEMA 3R requirements, be constructed of unpainted sheet aluminum alloy 5052-H32 with a
minimum thickness of 0.125 inch and have a smooth, uniform natural aluminum finish without
rivet holes, visible scratches or gouges on the outer surface. Other finishes are acceptable if
approved.
The dimensions for cabinets are listed below.
Table 995-7
Cabinet Dimensions in Inches
Cabinet Type Height Width Depth
340 66” - 68” 44” - 46” 26” - 28”
336 36” - 39” 24” - 26” 20’ - 22”
336S 46” - 48” 24” - 26” 22” - 24”
334 66” - 68” 24” - 26” 30” - 32”
332D 66” - 68” 48” - 50” 30” - 32”
P44 55” - 59” 44” - 46” 26” - 29”
The cabinet must be weather resistant and constructed with a crowned top to
prevent standing water. All exterior cabinet welds must be gas tungsten arc (TIG) welds and all
interior cabinet welds must be gas metal arc (MIG) or TIG welds. All exterior cabinet and door
seams must be continuously welded and smooth and all inside and outside edges of the cabinet
must be free of burrs, rounded and smoothed for safety. All welds must be neatly formed and
free of cracks, blow holes and other irregularities. Use ER5356 aluminum alloy bare welding
electrodes conforming to AWS A5.10 requirements for welding on aluminum. Procedures,
welders and welding operators must conform to AWS requirements as contained in AWS B3.0
and C5.6 for aluminum.
The cabinet must have a lifting eye plate on both sides of the top of the cabinet for
lifting and positioning it. Each lifting eye must be secured with a minimum of two bolts to the
cabinet body and have a lift point opening diameter of 0.75 inch and capable of supporting a
weight load of 1,000 pounds. All external bolt heads must be tamperproof.
Ground-mount cabinets must include a removable base plate and two aluminum
plates, welded inside, for anchoring the cabinet. Fabricate the plates from aluminum alloy
5052-H32 a minimum of 4 inches wide by 0.125 inch thick. Provide the cabinet with four 1 inch
diameter holes for anchoring.
995-11.5.1 Doors: Provide cabinets with front and rear doors, each equipped with
a lock and handle. Doors must be full size, matching the height and width dimensions of the
cabinet enclosure, with no fewer than three Type 4 or larger stainless steel hinges or; alternately,
one full-length “piano” hinge. Hinges must be constructed of 14 gauge stainless steel with
stainless steel hinge pins that are spot-welded at the top. Mount the hinges so that they cannot be
removed from the door or cabinet without first opening the door. Brace the door and hinges to 1245FY 2023-24Return to Table of Contents
withstand 100 pounds per vertical foot of door height load applied to the outer edge of the door
when standing open. Ensure there is no permanent deformation or impairment of any part of the
door or cabinet body when the load is removed.
Door opening must provide a flange that allows the door gasket to mate
with a flat surface. Include a gasket made of closed-cell material resistant to UV, weathering,
elevated temperatures, and permanent deformation that is permanently bonded to the inside of
each door forming a weather-tight seal when the door is closed.
995-11.5.2 Latches: Provide all cabinets with a three-point draw roller latching
system for the doors. The latching system must have the following latching points.
The latching points on the top and bottom of the cabinet must remain in
the locked position until the main cabinet door lock is unlocked. The locking mechanism must be
equipped with nylon rollers to secure the top and bottom of the door.
Provide the cabinet with a door stop that retains the main door open in a
90 degree and 120 degree position.
Outfit the doors with an industrial standard pin tumbler lock with No. 2
key, or an approved alternate, and hardware that allows the door to be secured using a padlock.
Provide two keys for each cabinet lock.
995-11.5.3 Rails: Provide the cabinet with four cabinet rails that form a cage for
mounting miscellaneous wiring panels and various mounting brackets. Use rails constructed of
either 0.1345 inch thick plated steel or 0.105 inch thick stainless steel that extend the length of
the cabinet’s sides, starting from the bottom of the enclosure. Rails must be keyhole designed
with slots 2 inches on center with a top opening of 5/8 inch in diameter to allow the insertion of a
5/8 inch by 1 inch carriage bolt. Rails must be 1-1/2 to 2 inches wide by 1/2 inch deep, drilled
and tapped for 10-32 screws or rack screws with EIA universal spacing. Do not use unistruts or
other rail types.
995-11.5.4 Racks: The cabinet must include a standard 19-inch EIA/TIA
equipment rack centered in the cabinet for mounting devices to be installed inside. Clearance in
the rack between the rails must be 17-3/4 inches.
995-11.5.5 Shelf: Provide a level, rollout internal shelf with a minimum work
area measuring 10 inches by 10 inches. The shelf must be capable of sustaining a constant
20 pound load and the shelf position must be adjustable.
995-11.5.6 Sunshield: Sunshields must be mounted with tamper resistant
hardware to standoffs that provide an air gap of at least one inch between the exterior cabinet
walls and the sunshields. Sunshield standoffs located on the roof of the cabinet must be welded
to the cabinet body. Construct sunshields of 0.125 inch thick 5052-H32 aluminum sheet with
corners that are rounded and smoothed for safety.
995-11.5.7 Ventilation: Provide ventilation through the use of a louvered vent at
the bottom of the door. Vent depth must not exceed 0.25 inch. Provide an air filter a minimum of
192 square inches and 1 inch thick behind the vent. The filter must be removable and held firmly
in place so that all intake air is filtered.
Provide a bottom trough and a spring-loaded upper clamp to hold the filter
in place. The bottom trough must drain any accumulated moisture to the outside of the field
cabinet. 1246FY 2023-24Return to Table of Contents
ITS field cabinets must have dual thermostatically controlled fans, with
one thermostat per fan, rated for continuous duty with a service life of at least three years. Mount
thermostats on the inside top of the cabinet. Thermostats must be user adjustable to allow
temperature settings ranging from a minimum of 70°F to a maximum of 140°F and capable of
activating the fans within plus or minus 5 degrees of the set temperature. Use UL listed exhaust
fans having a minimum air flow rating of 100 cubic feet per minute. Electric fan motors must
have ball or roller bearings. Vent the exhaust air from openings in the roof of the field cabinet.
995-11.5.8 Electrical Requirements: All equipment must conform to applicable
UL, NEC, EIA, ASTM, ANSI, and IEEE requirements. SPD's must be accessible from the front
of any panel used in the cabinet. Connect the SPD for the cabinet’s main AC power input on the
load side of the cabinet circuit breaker. All wiring must be laced. All conductors must be
stranded copper.
995-11.5.8.1 Service Panel Assembly: Provide a service panel assembly
to function as the entry point for AC power to the cabinet and the location for power filtering,
transient suppression and equipment grounding. Provide branch circuits, SPDs, and grounding as
required for the load served by the cabinet, including ventilation fans, internal lights, electrical
receptacles, etc.
995-11.5.8.2 Terminal Blocks: Terminate electrical inputs and outputs on
terminal blocks. The voltage and current rating of the terminal block must be greater than the
voltage and current rating of the wire fastened to it.
Terminate conductors on terminal blocks using insulated terminal
lugs large enough to accommodate the conductor to be terminated. When two or more
conductors are terminated on field wiring terminal block screws, use a terminal ring lug for
termination of those conductors. Number all terminal block circuits and cover the blocks with a
clear insulating material to prevent inadvertent contact.
995-11.5.8.3 Ground BusBar: Fabricate ground busbars of copper or
aluminum alloy material compatible with copper wire and provide at least two positions where a
No. 2 AWG stranded copper wire can be attached.
Mount the ground busbar on the side of the cabinet wall adjacent to
the service panel assembly for the connection of AC neutral wires and chassis ground wires. If
more than one ground busbar is used in a cabinet, use a minimum of a No. 10 AWG copper wire
to interconnect them. Connect the equipment rack to the ground busbar in the cabinet to maintain
electrical continuity throughout the cabinet.
Follow the PANI recommendations of USDA-RUS-1751 for
connections to the ground busbar. Producer (P) or electrical power and sources of stroke current
connections shall be on the left end of the busbar. Absorbing (A) or grounding wires shall be
connected immediately right of the P connections. Non-isolated (N) connections such as doors
and vents shall be connected to the right of the A connections. Isolated (I) equipment grounds
from equipment in the cabinet shall be connected on the right end of the busbar.
995-11.5.8.4 Power Distribution Assembly: Furnish a power distribution
assembly that fits in the EIA 19-inch rack and provides for protection and distribution of
120 VAC power.
995-11.5.8.5 Interior Lighting: Provide one or more light fixtures that
illuminate the entire interior of the cabinet. All light fixtures must automatically turn on when the
main cabinet door is opened and turn off when the door is closed. 1247FY 2023-24Return to Table of Contents
995-11.5.9 Adapter Bracket: Provide an adapter bracket for pole mounted
cabinets that is slotted or otherwise designed to allow banding straps to be installed to avoid pole
handholes.
995-11.6Generator and Auxiliary Power Connection: Traffic signal controller
cabinets and ITS cabinets must include a generator and auxiliary power connection.
Cabinets with generator and auxiliary power connection must include provisions
for the connection of an external power source, such as a portable generator, through a
weatherproof, secure interface. This feature must allow authorized personnel to access, connect,
and secure an external power source to the cabinet in order to restore power within five minutes
of arrival time at the cabinet. A 10 AWG, 600V UL rated cable, fabricated with L5-30
connectors, a minimum of 12 feet in length, must be supplied with cabinet assemblies for field
connection between generator and cabinet. The generator access door and cable entrance must
include means to prevent access to insects when cable is not present.
995-11.6.1 Automatic Transfer Switch: The transfer switch must meet UL 1008
and be rated equal to or higher than the design load of the cabinet’s main breaker and the
generator input twist-lock connector rating. The transfer switch must provide a means of
switching between normal utility power and auxiliary backup generator power. Switching time
cannot exceed 250 milliseconds. Ensure that the transfer switch does not allow simultaneous
active power from more than one source and does not allow generator backflow into normal
utility AC circuits.
995-11.6.2 Generator Access Panel: Include a generator connection panel
consisting of, at a minimum, the automatic transfer switch with a three-prong, 30 amp L5-30P
twist-lock connector with recessed male contacts for generator hookup. Locate the access panel
as close as possible to the main AC circuit breaker with the bottom of the access panel no less
than 24 inches above the bottom of the cabinet. Do not place the generator access panel on the
main cabinet door or back door. Locate and label the transfer switch and twist lock connector on
a panel easily accessible behind a weatherproof lockable exterior access door equipped with a
tamper-resistant hinge. Label this access door “Generator Access Door”. Provide the access door
with a No. 2 lock.
The access door and cable entrance must include means to prevent access
to insects when cable is not present. The generator hookup compartment must be recessed no
more than six inches into the cabinet but be deep enough to allow closing and locking of the
access door when the generator cable is connected. Avoid blocking access to any other
equipment in the cabinet.
995-11.7Small Equipment Enclosures: Small equipment enclosures must be a
minimum NEMA 3R rated and smaller than 16 inches wide by 24 inches tall by 12 inches deep.
The enclosure must be constructed of aluminum or non-metallic materials. Enclosures must
include a safe means of removing power from the installed equipment for servicing and
replacement, such as a switch, fuse, or breaker. Discrete markings, such as manufacturer name
and model, are permitted on the outside of small enclosures.
All fasteners less than 5/8 inch exposed to the elements must be Type 304 or 316
stainless steel.
Construct aluminum enclosures of 5052 sheet aluminum alloy with a minimum
thickness of 0.090 inch. Aluminum enclosures must have a uniform natural finish or be powder
coat painted in accordance with AAMA-2603-02 specifications. All welds, bends, and seams
must be neatly formed and free of cracks, blow holes and other irregularities. All inside and 1248FY 2023-24Return to Table of Contents
outside edges of the enclosure must be free of burrs, rivet holes, visible scratches, and gouges
and have a smooth, uniform finish.
Non-metallic enclosures must be UL 508A listed, be rated for outdoor use, and
resist chemicals, corrosion, and ultraviolet rays.
Enclosure doors must include a vandal resistant hinge and be secured with a locking latch or a
minimum of two quick-release Type 304 or 316 stainless steel latches with padlock hasps.
Removal of the hinge or hinge pin must not be possible while the enclosure is closed. Provide
two sets of keys with each lock.
Enclosures may be vented. Holes larger than 1/8 inch must be covered by heavy
duty screen.
Post mounted enclosures must be supplied with mounting hardware for attaching
the enclosure to a 4-1/2 inch (OD) aluminum post.
995-12Traffic Controller Accessories
995-12.1General: Traffic controller accessories must meet the industry standards in
Table 995-8.
Table 995-8
Traffic Controller Accessory Standards
Device Standard
Conflict Monitor NEMA TS1-1989, Section 6
Malfunction Management Unit NEMA TS2-2021, Section 4
Power Supply NEMA TS2-2021, Section 5.3.5
Load Switch NEMA TS2-2021, Section 6.2
Flasher NEMA TS2-2021, Section 6.3
Bus Interface Unit NEMA TS2-2021, Section 8
Model 206L Power Supply Unit CALTRANS TEES, 2020, 3.4
Model 208 Monitor Unit CALTRANS TEES, 2020, 3.5
Model 210 Monitor Unit CALTRANS TEES, 2020, 3.6
Power Distribution Assembly CALTRANS TEES, 2020, 6.4.3
Input File CALTRANS TEES, 2020, 6.4.4
995-12.2Time Switch: Ensure the time switch is a 24-hour timer which controls the
daily switching operation of circuit contacts at preselected times.
Type 1 time switches must contain a single circuit contact and a solid state timer
with at least 48 programmable on and off times.
Type 2 time switches must contain two circuit contacts and a solid state timer
with at least three independently programmable on and off times per circuit.
Type 3 time switches must contain three circuit contacts and a solid state timer
with at least three independently programmable on and off times per circuit.
995-12.2.1 Timing: Solid state timing must be accomplished by digital circuits
utilizing the power line 60 Hz frequency as the normal timing reference or GPS Time Sync.
Time-of-day must be settable and displayed in maximum increments of one minute.
995-12.2.2 Programming: Programming for selection of contact openings or
closures must be provided in maximum increments of one minute for Types 1 through 3 time
switches. 1249FY 2023-24Return to Table of Contents
A day omit device or circuit must be provided with Types 1 through
3 time switches to omit the programmed switching operation for any combination of up to three
days of the week. A positive means of indicating the day of the week must be provided with
Types 1 through 3 time switches.
995-12.2.3 Reserve Power: Type 1, Type 2, and Type 3 solid state time switches
must be provided with a battery backup circuit which maintains time during a power failure of up
to 10 hours. The timing accuracy of battery backup circuits during a power failure must be plus
or minus 0.5 seconds.
995-12.2.4 Output Circuit Contacts: Each output circuit contact must be rated
for a 3A, 115 VAC load. The output circuit contact must have 115 VAC present when the timer
turns the circuit on.
995-12.2.5 Time Switch Housing: Time switches must be enclosed in durable
sheet aluminum or approved alternate housing. A terminal strip or screws must be provided with
the time switch for AC power and all output circuit contacts.
995-13System Control Equipment
995-13.1Adaptive Signal Control System: Adaptive signal control systems external to
the traffic controller place detector calls to the traffic signal controller to adjust signalization
timing based on measured traffic conditions independently of the traffic signal controller’s
preconfigured timings.
The system must interface with the traffic controller using either the Synchronous
Data Link Control (SDLC) Port 1 interface and protocol or 24 VDC inputs/outputs available in
the traffic controller cabinet. Dynamically modifying controller configuration settings through
serial communications is not allowed.
The system must include a user interface that allows the configuration of
subcomponents, such as detectors and cameras, and includes remote monitoring and reporting.
The system must include the option of incorporating existing vehicle detection in
addition to the primary detection used by the adaptive signal control system.
The system must not affect the normal operation of the traffic signal controller
upon any failure of communication, detection, or system component.
Ensure adaptive signal control system hardware is permanently marked with
manufacturer name or trademark as well as part number and serial number. Ensure that the
markings are visible after installation.
995-13.2Environmental Requirements: Ensure system control equipment performs all
required functions during and after being subjected to the transients, temperature, voltage,
humidity, vibration, and shock tests described in NEMA TS2-2021, 2.2.7, 2.2.8, and 2.2.9.
995-14Internally Illuminated Signs
995-14.1General: Marking must be accomplished by permanently affixing an indelible
label, identification plate, dot peen type stamp, casting, or metal-marking. Signs must not exceed
9 feet in length or be larger than 18.0 square feet or less in area, and must not weigh more than
144 pounds Internally illuminated sign assemblies must be listed to the requirements of UL48
listed. Light emitting diode (LED) retrofit kits must be listed on the APL.
995-14.2Housing: The sign housing must be constructed of continuous 5052 or 6063-T5
aluminum. All housing, corners, and door seams must be continuously welded. All exterior
surfaces of the assembly must be powder-coat painted in accordance with Military Standard
MIL-PRF-24712A or AAMA-2603-02. Finish must meet the requirements of ASTM D3359, 1250FY 2023-24Return to Table of Contents
ASTM D3363, and ASTM D522. Sign housings with any interior airspace must consist of a box
type enclosure and separate hinged door assembly. The sign housing must include provisions to
prevent water from entering the sign housing. Drain holes in the sign larger than 0.125 inch must
be covered by a screen.
Signs must have removable sign faces. The sign face must be secured by a
method that holds the sign face securely in place. Slide-in grooves are allowed to secure the sign
face if the sign is edge lit.
The sign face must be a translucent lens constructed of 0.125-inch thick high
impact strength polycarbonate or acrylic meeting UL48. Background must be translucent
retroreflective sheeting coated with a transparent, pressure-sensitive adhesive film. Color must
meet the criteria as detailed in Section 994. Retroreflective sheeting must meet the requirements
of Section 994 and be listed on the APL.
If a door opens upward, it must have a bracket on each side to secure the door in
the open position during maintenance. Doors must be permanently and continuously sealed with
a foam gasket listed to UL157 to prevent the entry of water into the sign housing. Each door
must be secured from opening by stainless steel rotary action draw latches as follows:
Signs of 5 feet up to 7 feet in length must have a minimum of three latches
for each sign door.
Signs over 7 feet up to 9 feet in length must have a minimum of four
latches for each door.
The rotary action draw latch must be captive and will not become detached or
allow the door to open when the sign housing is torqued or twisted
The sign assembly must be designed and constructed to withstand 150 mph wind
loads meeting the requirements of the Department’s Structures Manual.
995-14.3Luminance: The sign face must be illuminated evenly across the entire surface
Contrast ratio between the background and legend must be established by the lowest and the
highest color retroreflective measurement and shall be at least 4:1. Measure the retroreflectivity
in accordance with ASTM D4956.
995-14.3.1 Background Luminance: Minimum luminance for the legend portion
of the street sign face must be no less than 87.5 lux. The luminance must be determined by
averaging a minimum of seven readings. Four of the readings must be taken near the midpoint of
a line that would span between the outside corners of the background and the outside corners of
the legend. One reading must be taken near the midpoint of a line that would connect the top
corner readings. One reading must be taken near the midpoint of a line that would connect the
bottom corner readings. One reading must be taken near the vertical and horizontal midpoint of
the sign.
995-14.3.2 Border and Lettering Luminance: Minimum luminance of the
legend and border must be 350 lux. The luminance must be determined by averaging a minimum
of 17 readings. There must be a minimum of one reading from each letter in the legend.
Readings within the legend must alternate between the top, middle and bottom portion of each
letter. Readings within top and bottom of the border must be perpendicular to the top and bottom
readings in the background. Readings within the sides of the border must be taken parallel to the
readings taken within each letter.
995-14.4Mechanical Requirements: All assembly hardware, including nuts, bolts,
external screws and locking washers less than 5/8-inch in diameter must be Type 304 or 316
passivated stainless steel. All assembly hardware greater than or equal to 5/8-inch in diameter 1251FY 2023-24Return to Table of Contents
must be galvanized. Bolts, studs, and threaded rod must meet ASTM A307. Structural bolts must
meet ASTM F3125, Grade A325.
995-14.5Electrical Requirements: Electrical wiring must meet NEC requirements for
the light source provided. All wiring must be copper wire. All internal electrical wiring must be
tight and secure. The sign must include an accessible electrical power service entrance
compartment (internal or external) for connection of field wiring. External compartments must
be weather-tight. All power supplies and ballasts must be Federal Communications Commission
Electrical connections must be protected against corrosion. All signs must have
provisions for an integrated photocell.
995-14.6Environmental Requirements: The illuminated sign assembly must operate
properly during and after being subjected to the environmental testing procedures described in
NEMA TS 4-2016, Section 2.
995-14.7Warranty: Internally illuminated signs must have a manufacturer’s warranty
covering defects for five years from the date of final acceptance by the Engineer in accordance
with 5-11 and Section 608.
995-15Highlighted Signs
995-15.1General: Highlighted signs must meet the design and functional requirements
specified in this Section and Section 2A of the MUTCD. Use LEDs to highlight the sign’s shape,
color, or message.
Stop, Do Not Enter, Yield, and Wrong Way signs that are highlighted with LEDs
must use red LEDs. All other signs must use LEDs which resemble the color of the sign
background color.
995-15.2Performance Requirements: Highlighted signs are capable of automatically
dimming to reduce brightness of the LEDs at nighttime.
Highlighted signs that rely upon solar power or batteries must be capable of at
least 10 days of continuous operation without the need for charging.
995-15.3Cabinets: If the highlighted sign includes a cabinet, the cabinet must be
currently listed on the APL or meet the requirements of Section 676.
995-15.4Mechanical Requirements: All assembly hardware, including nuts, bolts,
external screws and locking washers less than 5/8-inch in diameter must be Type 304 or 316
passivated stainless steel. All assembly hardware greater than or equal to 5/8-inch in diameter
must be galvanized. Bolts, studs, and threaded rod shall meet ASTM A307. Structural bolts must
meet ASTM F3125, Grade A325.
995-15.5Electrical Requirements: Electrical wiring must meet NEC requirements for
the light source provided. All wiring must be copper wire. All internal electrical wiring must be
tight and secure. The sign must include an accessible electrical power service entrance
compartment (internal or external) for connection of field wiring. External compartments must
be weather-tight. All power supplies and ballasts must be Federal Communications Commission
Electrical connections must be protected against corrosion. All signs must have
provisions for an integrated photocell.
995-15.6Environmental Requirements: The highlighted must operate properly during
and after being subjected to the environmental testing procedures described in
NEMA TS 4-2016, Section 2. 1252FY 2023-24Return to Table of Contents
995-15.7Warranty: Highlighted signs must have a manufacturer’s warranty covering
defects for three years from the date of final acceptance by the Engineer in accordance with 5-11
and Section 608.
995-16Dynamic Message Signs
995-16.1General: Dynamic message signs (DMS) must meet the requirements of
NEMA TS4-2016. DMS are classified by the type of sign display and the type of mechanical
construction. Use only equipment and components that meet the requirements of these minimum
specifications and are listed on the APL. DMS LED retrofit kits must be listed on the APL.
995-16.1.1 Front Access DMS: Front access signs must meet the requirements of
NEMA TS 4-2016, Section 3.2.6.
995-16.1.2 Walk-In DMS: Walk-in signs must meet the requirements of NEMA
TS 4-2016, Section 3.2.8.
995-16.1.3 Embedded DMS: Embedded DMSs must be mounted to ground
traffic signs, overhead traffic signs, or overhead cantilever traffic signs.
995-16.2Sign Housing Requirements for all DMS: The external skin of the sign
housing must be constructed of aluminum alloy 5052 H32. The interior structure must be
constructed of aluminum. Internal frame connections or external skin attachments must not
solely rely upon adhesive bonding or rivets.
The sign enclosure must meet the requirements of NEMA TS 4-2016,
Section 3.1.1. All drain holes and other openings in the sign housing must be screened to prevent
the entrance of insects and small animals.
The sign housing must comply with the fatigue resistance requirements of the
AASHTO LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and
Traffic Signals. Design and construct the DMS unit for continuous usage of at least 20 years. The
sign assembly must be designed in accordance with the Department’s Structures Manual,
including a wind load of 150 miles per hour.
The top of the housing shall include multiple steel lifting eyebolts or equivalent
hoisting points. Hoist points are positioned such that the sign remains level when lifted. The
hoist points and sign frame allow the sign to be shipped, handled, and installed without damage.
All assembly hardware, including nuts, bolts, screws, and locking washers less
than 5/8-inch in diameter, must be Type 304 or 316 passivated stainless steel and meet the
requirements of ASTM F593 and ASTM F594. All assembly hardware greater than or equal to
5/8-inch in diameter must be galvanized and meet the requirements of ASTM A307.
All exterior, excluding the sign face, and all interior housing surfaces must be a
natural aluminum mill finish. Signs must be fabricated, welded, and inspected in accordance with
the requirements of the current ANSI/AWS Structural Welding Code-Aluminum.
The sign housing must meet the requirements of NEMA TS 4-2016, Section 3.2.9
for convenience outlets.
995-16.2.1 Sign Housing for Walk-In DMS: Exterior seams and joints, except
the finish coated face pieces, must be continuously welded using an inert gas welding method.
Limit the number of seams on the top of the housing to a maximum of three. Stitch weld the
exterior housing panel material to the internal structural members to form a unitized structure.
The exterior mounting assemblies must be fabricated from aluminum alloy
6061-T6 extrusions a minimum of 0.1875 inch thick. Include a minimum of three 6061-T6
structural aluminum Z members on the rear of the sign housing in accordance with the Standard
Plans. The structural aluminum Z members must run parallel to the top and bottom of the sign 1253FY 2023-24Return to Table of Contents
housing and are each a single piece of material that spans the full length of the sign. The
structural aluminum Z members must be attached to the internal framework of the sign.
The hoist points must be attached directly to structural frame members by
the sign manufacturer.
Housing access must be provided through an access door that meets the
requirements of NEMA TS 4-2016, Section 3.2.8.1. The access door must include a keyed
tumbler lock and a door handle with a hasp for a padlock. The door must include a closed-cell
neoprene gasket and stainless steel hinges.
The sign housing must meet the requirements of NEMA TS 4-2016,
Section 3.2.8.3 for service lighting. If incandescent lamps are provided, they must be fully
enclosed in heavy-duty shatterproof, protective fixtures. The incandescent fixtures must include
aluminum housing and base, a porcelain socket, and clear glass inner cover. All removable
components must be secured with set screws. If fluorescent lamps are provided, they must be
fitted with shatter proof protective guards.
The sign housing must include emergency lighting that automatically
illuminates the interior in the event of a power outage. Emergency lighting must be capable of
operation without power for at least 90 minutes.
995-16.2.1.1 Walk-In DMS Work Area: The walk-in DMS must have a
work area that meets the requirements of NEMA TS 4-2016, Section 3.2.8.2. All edges of the
walkway are finished to eliminate sharp edges or protrusions.
995-16.2.2 Sign Housing for Front Access and Embedded DMS: Front access
and embedded signs must meet the requirements of NEMA TS 4-2016, Section 3.2.5 and
Section 3.2.6. Accessing the sign housing must not require specialized tools or excessive force to
open.
995-16.2.3 Housing Face Requirements for all DMS: The sign face must meet
the requirements of NEMA TS 4-2016, Section 3.1.3. All sign face surfaces are finished with a
matte black coating system that meets or exceeds American Architectural Manufacturers
Association (AAMA) Specification No. 2605. Submit certification that the sign face parts are
coated with the prescribed thickness. Except for embedded DMS, the sign face must include a
contrast border that meets the requirements of NEMA TS 4-2016, Section 3.1.6.
995-16.2.3.1 Housing Face for Walk-In DMS: No exposed fasteners are
allowed on the housing face. The display modules shall be easily and rapidly removed from
within the sign without disturbing adjacent display modules.
995-16.2.3.2 Housing Face for Front Access and Embedded DMS: Any
exposed fasteners on the housing face must be the same color and finish as the housing face.
Only captive fasteners may be used on the housing face.
995-16.2.3.3 External Fascia Panels: If the sign includes external fascia
panels, they must be constructed using aluminum. Each fascia panel is finished with a matte
black coating system that meets or exceeds AAMA Specification No. 2605.
995-16.2.3.4 Lens Panel Assembly: If the sign includes lens panel
assemblies, they must be modular in design, removable, and interchangeable without
misalignment of the lens panel and the LED pixels. The lens panel assembly must consist of an
environmental shielding layer coating to protect and seal the LED and internal electronics. The
coating must be a minimum 90% UV opaque. Lens panels must have a matte black coating that
meets or exceeds AAMA Specification No. 2605. Lens panels must include a mask constructed
of 0.080 inch minimum thickness aluminum. The mask must be perforated to provide an aperture 1254FY 2023-24Return to Table of Contents
for each pixel on the display module. The apertures must not block the LED output at the
required viewing angle.
995-16.2.4 Sign Housing Ventilation System: The ventilation systems for walk-
in, front-access, and embedded DMS must meet the requirements of NEMA TS 4-2016,
Section 3.1.2.
Air drawn into the sign is filtered upon entry. The ventilation system must
be automatically tested once each day and is able to be tested on command from remote and
local control access locations. The sign must include a sensor or a sensor assembly to monitor
airflow volume to predict the need for a filter change. The ventilation system fans must possess a
100,000 hour, L10 life rating.
995-16.2.4.1 Ventilation System for Walk-In DMS: The sign includes a
fail-safe ventilation subsystem that includes a snap disk thermostat that is independent of the sign
controller. The thermostat is preset at 130°F. If the sign housing’s interior reaches 130°F, the
thermostat must override the normal ventilation system, bypassing the sign controller and turning
on all fans. The fans must remain on until the internal sign housing temperature falls to 115°F.
995-16.2.5 Sign Housing Temperature Sensor: The sign controller must
continuously measure and monitor the temperature sensors. The sign must blank when a critical
temperature is exceeded and reports this event when polled. Ensure that remote and local
computers can read all temperature measurements from the sign controller.
995-16.2.6 Sign Housing Humidity Sensor: Humidity sensors must detect from
0 to 100% relative humidity in 1% or smaller increments. Sensors must operate and survive in
0 to 100% relative humidity, and have an accuracy that is better than plus or minus 5% relative
humidity. Use of a humidistat is not acceptable.
995-16.2.7 Sign Housing Photosensors: The sign must meet the requirements of
NEMA TS 4-2016, Section 9.1.3. The sensors must provide accurate ambient light condition
information to the sign controller for automatic light intensity adjustment. The automatic
adjustment of the LED driving waveform duty cycle must occur in small enough increments that
the sign’s brightness changes smoothly, with no perceivable brightness change between adjacent
levels. Stray headlights shining on the photoelectric sensor at night must not cause LED
brightness changes.
The brightness and color of each pixel must be uniform over the sign’s
entire face within a 30 degree viewing angle in all lighting conditions.
995-16.3Display Modules: Display modules manufactured by one source and fully
interchangeable throughout the manufacturer’s sign system shall be provided. The removal or
replacement of a complete display module or LED board must be accomplished without the use
of special tools.
Display modules must contain solid-state electronics needed to control pixel data
and read pixel status.
The sign must have a full matrix display area as defined in NEMA TS 4-2016,
Section 1.6.
995-16.3.1 LED and Pixel Specifications: LED lamps must have a minimum
viewing angle of 30 degrees.
All pixels in all signs in a project, including operational support supplies,
must have equal color and on-axis intensity. The sign display must meet the luminance
requirements of NEMA TS 4-2016, Section 5.4, for light emitting signs connected at full power.
Amber displays must produce an overall luminous intensity of at least 9200 candelas per square 1255FY 2023-24Return to Table of Contents
meter when operating at 100% intensity. Provide the LED brightness and color bins that are used
in each pixel to the Engineer for approval. The LED manufacturer must demonstrate testing and
binning according to the International Commission on Illumination (CIE) 127-1997 Standard.
All LEDs must operate within the LED manufacturer’s recommendations
for typical forward voltage, peak pulsed forward current, and other ratings. Component ratings
must not be exceeded under any operating condition.
Ensure that the operational status of each pixel in the sign can be
automatically tested once a day. Ensure that the pixel status test determines the functional status
of the pixel as defined by the pixel Failure Status object in National Transportation
Communications for ITS Protocol (NTCIP) 1203 v02.39 and does not affect the displayed
message for more than half a second.
LEDs must be individually mounted directly on a printed circuit board
(PCB).
995-16.3.2 Optical, Electrical, and Mechanical Specifications for Display
Modules: The display modules must be rectangular and have an identical vertical and horizontal
pitch between adjacent pixels. The separation between the last column of one display module
and the first column of the next module must be equal to the horizontal distance between the
columns of a single display module. Full matrix DMS must have the ability to display messages
with 20mm pixel pitch (resolution).
The LED circuit board must be a NEMA FR4-rated, single 0.062 inch,
black PCB. No PCB shall have more than two PCB jumper wires present. All PCBs shall be
finished with a solder mask and a component-identifying silk screen.
PCBs with conformal coating meeting the material requirements of
IPC-CC-830 or MIL-I-46058C Military Standard, United States Department of Defense
Any devices used to secure LEDs must not block air flow to the LED
leads or block the LED light output at the required viewing angle. All components on the LED
side of a PCB must be black.
There must be a minimum of two power supplies that are wired in a
parallel configuration for redundancy. If one, or 25% of the supplies in a group, whichever is
greater, completely fails, the sign shall still be supplied with enough power to run 40% of all
pixels at a 100% duty cycle with an ambient operating temperature of 165°F.
The sign controller must continuously measure and monitor all LED
module power supply voltages and provide the voltage readings to the TMC or a laptop
computer on command.
LEDs must be protected from external environmental conditions,
including moisture, snow, ice, wind, dust, dirt, and UV rays. Epoxy must not be used to
encapsulate the LEDs.
995-16.3.3 Display Area for Walk-In DMS: The display area must be capable of
displaying three lines with a minimum of 15 characters per line, using an 18 inch font that meets
the height to width ratio and character spacing in the MUTCD, Section 2L.04, paragraphs 05, 06,
and 08.
995-16.4Characters, Fonts, and Color: The signs must be capable of displaying
American Standard Code for Information Interchange (ASCII) characters 32 through 126,
including all uppercase and lowercase letters, and digits 0 through 9, at any location in the
message line. Submit a list of the character fonts to the Engineer for approval. 1256FY 2023-24Return to Table of Contents
All signs must be loaded (as a factory default) with a font in accordance with or
that resembles the standard font set described in NEMA TS 4-2016, Section 5.6. For signs with a
pixel pitch of 35 mm or less, the sign must be loaded (as a factory default) with a font set that
resembles the FHWA Series E2000 standard font.
DMS fonts must have character dimensions that meet the MUTCD,
Section 2L.04, paragraph 08.
Full-color signs must display the colors prescribed in the MUTCD,
Section 1A.12.
995-16.5Main Power Supply and Energy Distribution Specifications: A nominal
single-phase power line voltage of 120/240 VAC must be provided. The DMS must meet the
requirements of NEMA TS 4-2016, Section 10.2.
All 120 VAC wiring must have an overall nonmetallic jacket or be placed in metal
conduit, pull boxes, raceways, or control cabinets and installed as required by the NEC. Do not
use the sign housing as a wiring raceway or control cabinet.
Surge protective devices (SPD) must be installed or incorporated in the sign
system by the manufacturer to guard against lightning, transient voltage surges, and induced
current. SPDs must meet or exceed the requirements of Section 996. SPDs must protect all
electric power and data communication connections.
995-16.6Uninterruptible Power Supply (UPS): Walk-in DMS must include a UPS that
can be installed within the sign housing or within the ground mounted control cabinet. Front
access and embedded signs must include a UPS that can be installed within the ground mounted
control cabinet. The UPS system must be capable of displaying the current messages on a sign
when a power outage occurs. Signs with an UPS must be able to operate on battery power and
display text messages for a minimum of two hours. The system must use sealed absorbed glass
mat (AGM) batteries.
995-16.7Operational Support Supplies: Furnish the operational support supplies listed
in Table 995-8. Promptly replace any of the supplies used to perform a warranty repair.
For every group of 10 or fewer DMSs provided or required, provide one set of
supplies as follows:
Table 995-9
Operational Support Supplies
1 each Sign controller and I/O board(s)
1 per DMS LED display modules
1 each Display power supply
1 each Uninterruptible power supply
2 each Surge suppression sets
1 each Fan assembly
995-16.8Components: All components must meet the requirements of NEMA TS 4-
2016, Section 8.
995-16.8.1 Mechanical Components: All fasteners, including bolts, nuts, and
washers less than 5/8 inch in diameter, must be passivated stainless steel, Type 316 or 304 and
meet the requirements of ASTM F593 and ASTM F594 for corrosion resistance. All bolts and
nuts 5/8 inch and over in diameter must be galvanized and meet the requirements of
ASTM A307. Self-tapping screws must not be used. All parts must be fabricated from corrosion 1257FY 2023-24Return to Table of Contents
resistant materials, such as plastic, stainless steel, aluminum, or brass. Construction materials
must be resistant to fungus growth and moisture deterioration. All dissimilar metals must be
separated with an inert, dielectric material.
995-16.8.2 Sign Controller: The sign controller must monitor the sign in
accordance with NEMA TS 4-2016, Section 9. The sign must monitor the status of any
photocells, LED power supplies, humidity, and airflow sensors. Sign controllers must use fiber
optic cables for data connections between the sign housing and ground-level cabinet.
The sign controller must meet the requirements of NEMA TS 4-2016,
Sections 8.3 and 8.4. The sign controller must be capable of displaying a self-updating time and
date message on the sign. Sign controllers within ground cabinets must be rack-mountable,
designed for a standard Electronic Industries Alliance (EIA) EIA-310 19 inch rack, and includes
a keypad and display.
995-16.8.3 Display System Hardware: The sign must utilize a system data
interface circuit for communications between the sign controller and display modules. Except for
embedded DMS, the following components must reside inside the sign housing: sign controller
(master or slave), display system interface circuits, display modules, power supplies, local and
remote control switches, LED indicators, EIA-232 null modem cables (minimum of four feet
long for connecting laptop computer to sign controller), and surge protective devices.
995-16.8.4 Control Cabinet: A control cabinet that meets the requirements of
Section 676 shall be provided. The minimum height of the cabinet must be 46 inches.
A ground control cabinet that includes the following assemblies and
components: power indicator, surge suppression on both sides of all electronics, communication
interface devices, connection for a laptop computer for local control and programming, a four
foot long cable to connect laptop computers, a workspace for a laptop computer, and duplex
outlets shall be provided.
All telephone, data, control, power, and confirmation connections between
the sign and ground control box, and for any required wiring harnesses and connectors shall be
provided.
995-16.8.5 Sign Controller Communication Interfaces: The sign controller
must have communication interfaces in accordance with NEMA TS 4-2016, Section 8.3.2.
Ensure that EIA-232 serial interfaces support the following:
Table 995-10
Communication Interface Requirements
Data Bits 7 or 8 bits
Parity Even, Odd, or None
Number Stop Bits 1 or 2 bit
The sign controller must have a 10/100 Base TX 8P8C port or a 100 Base
FX port Ethernet interface.
The TMC or a laptop computer must be able to remotely reset the sign
controller.
995-16.9Message and Status Monitoring: The DMS must provide two modes of
operation: (1) remote operation, where the TMC commands and controls the sign and determines
the appropriate message or test pattern; and (2) local operation, where the sign controller or a 1258FY 2023-24Return to Table of Contents
laptop computer commands and controls the sign and determines the appropriate message or test
pattern.
The sign must perform the following functions:
selected. Ensure that there is a visual indicator on the controller that identifies whether the sign is
under local or remote control.
message or any one of the messages stored in the sign controller’s nonvolatile memory when the
control mode is set to local.
the selected message.
Ensure that the sign can be programmed to display a user-defined message,
including a blank page, in the event of power loss.
Ensure that message additions, deletions, and sign controller changes may be
made from either the remote TMC or a local laptop computer. Ensure that each font may be
customized, and modifications to a font may be downloaded to the sign controller from the TMC
or a laptop computer at any time without any software or hardware modifications.
Ensure that there is no perceivable flicker or ghosting of the pixels during sign
erasure and writing periods.
995-16.10TMC Communication Specification for all DMS: The sign controller must
be addressable by the TMC through the Ethernet communications network using software that
complies with the NTCIP 1101 base standard (formerly the NEMA TS 3.2-1996 Standard),
including all amendments as published at the time of Contract letting, the NTCIP Simple
Transportation Management Framework, and conforms to Compliance Level 1. The software
must implement all mandatory objects in the supplemental requirement SR-700-4.1.1, Dynamic
Message Sign NTCIP Requirements, as published on the Department’s State Traffic Engineering
and Operations Office web site at the following URL: https://www.fdot.gov/traffic/Traf-
Sys/Product-Specifications.shtm.
The sign must comply with the NTCIP 1102v01.15, 2101v01.19, 2201v01.15,
2202v01.05, and 2301v02.19 Standards. The sign must comply with NTCIP 1103v02.17,
Section 3.
Ensure that the controller’s internal time clock can be configured to synchronize
to a time server using the network time protocol (NTP). NTP synchronization frequency must be
user-configurable and permit polling intervals from once per minute to once per week in one-
minute increments. The controller must allow the user to define the NTP server by IP address.
995-16.11Sign Control Software: The sign must be provided with computer software
from its manufacturer that allows an operator to program, operate, exercise, diagnose, and read
current status of all sign features and functions using a laptop computer. The sign control
software must provide a graphical representation that visibly depicts the sign face and the current
ON/OFF state of all pixels as well as allows messages to be created and displayed on the sign.
995-16.12Environmental Requirements: The DMS must meet the requirements of
NEMA TS 4-2016, Section 2.
995-16.13Warranty: The DMS system and equipment must have a manufacturer’s
warranty covering defects for a minimum of five years from the date of final acceptance by the
Engineer in accordance with 5-11 and Section 608. 1259FY 2023-24Return to Table of Contents
995-17Electronic Display Sign
995-17.1General: All electronic display signs (EDS) must meet the physical display and
operational requirements for warning, guide, or regulatory signs described in the MUTCD and
the SHS.
The term EDS refers to a general category of electronically enhanced signs that
includes electronic road signs (ERS) with warning, regulatory, or guide legends; electronic speed
feedback signs (ESFS); and blank-out signs (BOS).
EDS must allow attachment to vertical and horizontal support structures as part
of a single or double sign post configuration. Bolts must be used for load bearing attachments.
995-17.2Requirements Common to all EDS: All EDS must be designed to withstand
the loads defined in the Department’s Structures Manual without deformation or damage. EDS,
other than BOS, must provide an option to include flashing beacons. Printed circuit boards must
be protected with conformal coating. Housings that contain electronics must be constructed of
aluminum alloy sheet a minimum of .090 inch thick. Welding used during the construction of
EDS must be accordance with Section 965.
Signs included on the APL will be designated with a size and type category and
may be listed with restrictions, such as “requires District Traffic Operations Engineer approval”,
“school zones only”, or “low speed only”.
995-17.2.1 Electronic Display Sign with Static Sign Panel: EDS that include
both a static sign panel and dynamic display may be a modular system comprised of a static sign
panel with an attached electronic display. Static sign panels must meet the Department’s
requirements for highway signing found in this Section.
995-17.2.2 Electronic Display: Electronic displays must appear completely blank
ambient light conditions.
995-17.2.3 Housing: The housing must protect and seal the dynamic display and
other internal electronics. Any polycarbonate material used on the sign face must be a minimum
90% UV opaque and resistant to fading and yellowing. The housing must be NEMA 3R rated
and prevent unauthorized access. The housing must include weather tight cable entry or
connection points for any required power or data connections.
995-17.2.4 Cabinet: Any equipment cabinets provided with the EDS must be
listed on the APL.
995-17.2.5 Optical, Electrical, and Mechanical Specifications for Display
Modules: All LEDs must operate within the LED manufacturer’s recommendations for typical
forward voltage, peak pulsed forward current, and other ratings. Component ratings must not be
exceeded under any operating conditions.
995-17.2.6 LED and Pixel Specifications: All LEDs used in the display must
have a wavelength output that varies no more than plus or minus two nanometers from the
specified peak wavelength. The display and LED pixel cone of vision must be a minimum of
15 degrees (centered around the optical axis, or zero point, of the pixel). The cone perimeter is
defined by the point where light output intensity is 50% of the intensity measured at the zero
point of the pixel. For all colors other than white, the sign display must produce an overall
luminous intensity of at least 9200 candelas per square meter when operating at 100% intensity.
For white or full color matrix displays, the sign display must produce white with an overall
luminous intensity of at least 12,400 candelas per square meter when operating at 100%
intensity. Submit documentation that indicates the LED brightness and color bins that are used in 1260FY 2023-24Return to Table of Contents
each pixel. LEDs must be individually mounted on a PCB and must be able to be removed and
replaced using conventional electronic repair methods. Encapsulated LEDs within a pixel are not
allowed. ERS LEDs must be arranged and powered in a manner that maintains a discernible
message in the event of a single LED or pixel failure.
995-17.2.7 Character Size, Fonts, and Graphics: The minimum numeral and
letter size of the electronic display must meet or exceed the numeral and letter sizes prescribed in
the MUTCD and the SHS. Fonts and graphics must mimic the characteristics of fonts and
graphics defined in the MUTCD and SHS.
995-17.2.8 Electronic Display Controller: Any electronic display controller
required for the operation of the EDS shall be housed within the sign and be equipped with a
security lockout feature to prevent unauthorized use. The controller shall have the capability to
provide a stipulated default message upon loss of controller function. A blank message is
acceptable.
995-17.2.9 Communication: The electronic display controller shall possess a
minimum of one serial, Ethernet, USB, or Bluetooth interface with the ability to connect to a
laptop computer. The serial data interface shall support multiple data rates from 9,600 bps to
115,200 bps.
995-17.2.10 Configuration and Management: Ensure that the sign is provided
with computer software from its manufacturer that allows a user to program, operate, exercise,
diagnose, and read current status of all sign features and functions using a laptop. Configuration
and management functions must be password protected.
995-17.2.11 Operation and Performance: Ensure that the EDS is visible from a
distance of at least 1/4 mile and legible from a distance of 400 feet for applications on roads with
a speed limit less than 45 mph and visible from a distance of at least 1/2 mile and legible from a
distance of at least 650 feet for roads with speed limits 45 mph or higher. In both cases, the
requirements must be met under both day and night conditions.
The electronic display shall automatically adjust brightness for day and
night operation. The EDS must be equipped with a light sensor that accurately measures ambient
light level conditions at the sign location. The EDS must automatically adjust LED intensity
based on the ambient light conditions in small enough increments that the sign’s brightness
changes smoothly, with no perceivable brightness change between adjacent levels. Stray
headlights shining on the photoelectric sensor at night must not cause LED brightness changes.
Flashing messages must not exceed 150 flashes per minute.
995-17.2.12 Mechanical Specifications: EDS mounting provisions and mounting
hardware must accommodate sign weight and wind loading requirements of the Department’s
Structures Manual. BOS must be designed to accommodate overhead attachment using a tri-stud
signal hanger. Multiple tri-stud attachment points may be used to meet weight and wind loading
requirements. Tri-stud attachment points must be weather-tight and structurally reinforced.
995-17.2.13 Fasteners and Attachment Hardware: Ensure that all assembly
hardware, including nuts, bolts, external screws and locking washers less than 5/8 inch in
diameter, are Type 304 or 316 passivated stainless steel. Stainless steel bolts, screws and studs
must meet ASTM F593. Nuts must meet ASTM F594. All assembly hardware greater than or
equal to 5/8 inch in diameter must be galvanized. Bolts, studs, and threaded rod must meet
ASTM A307. Structural bolts must meet ASTM F3125, Grade A325. 1261FY 2023-24Return to Table of Contents
995-17.2.14 Electrical Specifications: All power inputs must be fuse and reverse
polarity protected. All EDS must be able to recover from power loss and return to their
operational state without user intervention.
995-17.2.14.1 Solar Power: Solar powered signs must be capable of fully
autonomous operation 24 hours per day, 365 days per year. Batteries must be a standard 12 volt
deep cycle battery suitable for the application and operating environment. Flooded lead-acid
batteries are prohibited.
Batteries must be capable of providing 10 days of continuous
operation without sunlight. Charging system must use a solar charge controller with temperature
compensation. The system must provide for automatic battery charging, overcharge protection,
and have indications that display current status and faults.
995-17.2.14.2 AC Power: Fluctuations in line voltage must have no
visible effect on the appearance of the display.
995-17.2.15 Environmental Requirements: The EDS assembly must operate
properly during and after being subjected to the environmental testing procedures described in
NEMA TS 4-2016, Section 2. Fog, frost, or condensation must not form within the dynamic
portion of the sign. Electronics must meet FCC Title 47, Subpart B Section 15.
995-17.2.16 Warranty: The EDS systems and equipment furnished must have a
manufacturer’s warranty covering defects in assembly, fabrication, and materials for a minimum
of three years.
995-17.3Electronic Warning Signs: EWS must include a secure wireless connection to
communicate with a nearby laptop.
995-17.3.1 EWS Foreground/Background Colors: If a black background is
used on the changeable electronic display, the color used for the legend must match the
background color that would be used on a standard sign for that type of legend, in accordance
with the MUTCD. Black EWS display backgrounds must be flat black (FED-STD-595-37038)
with a reflectance value not exceeding 25%. EWS must utilize yellow LEDs with a peak
wavelength of either 585 or 590 nanometers. EWS must have a minimum one-inch contrasting
margin around illuminated characters or graphics.
995-17.3.2 Speed Detector: EWS that detect or display the speed of approaching
vehicles must be programmable for the posted speed limit and the maximum speed to display.
When the detected speed exceeds the maximum programmed speed (high speed cut-off)
threshold, the display must automatically blank. Alternately, the display may show an alert
message such as “SLOW DOWN” when speeds above the maximum programmed speed
threshold are detected.
The EWS must detect when the posted speed is exceeded by one mph and
then activate the alert. When the alert is activated, the display shall be able to flash. When no
advancing traffic is detected, the display must be blank. The speed detector must not activate
alerts for vehicles outside the display cone of vision.
The speed detector must meet the requirements of FCC Title 47, Part 90
and not require an FCC operating license. The speed detector must operate on 10.8 to 16.6 VDC
and draw less than three amperes. The EWS must monitor and display the speed of approaching
traffic only. The EWS detector must be able to accurately detect and determine the speed of
approaching vehicles. The EWS must be capable of measuring and displaying speeds of
approaching traffic only between 10 and 99 mph with an accuracy of plus or minus one mph,
1,000 feet in advance of the sign. 1262FY 2023-24Return to Table of Contents
995-17.4Electronic Regulatory Signs: Display modules for ERS must have a minimum
two-inch contrasting margin around digits, text, or graphics. ERS must utilize LED technology
for the dynamic display.
995-17.4.1 ERS Battery Backup System: AC powered signs must include a
battery backup system that maintains full operation of the sign for a minimum of two hours in
the event of utility power loss. Operation on battery backup can have no visible effect on the
appearance of the display.
995-17.4.2 Variable Speed Limit Signs: Variable speed limit signs (VSLS) must
be able to display speed limits from 5-70 mph in five mph increments and mimic the physical
appearance of a static regulatory speed limit sign as shown in the MUTCD and SHS. VSLS must
use black characters on a white background. VSLS must log the time and date of any speed limit
change to internal non-volatile memory. The log must be able to record a minimum of
1,000 events in a first-in, first-out fashion.
995-17.4.2.1 VSLS Controller Communications: VSLS must be
equipped with a sign controller that includes a minimum of one Ethernet 10/100 Base TX 8P8C
port.
995-17.4.2.2 Configuration and Management Requirements for VSLS:
VSLS must support remote management from a TMC and local management using a laptop
computer. Remote and local computers must be able to reset VSLS sign controller. VSLS must
log and report status, errors, and failures, including data transmission errors, receipt of invalid
data, communication failure recoveries, power failures, power recoveries, display errors, fan and
airflow status, temperature status, power supply status, and information on the operational status
of the temperature, photocell, airflow, humidity, and LED power supply sensors.
The sign controller must be addressable through an Ethernet
communication network using software that complies with the NTCIP requirements published
online by the Department’s Transportation Traffic Engineering Research Laboratory (TERL) at:
https://www.fdot.gov/traffic/. The sign must implement any NTCIP standards required to
achieve interoperability and interchangeability. Any additional objects implemented by the
software must not interfere with the standard operation of any mandatory objects. VSLS must be
compatible with the Department’s SunGuide ® software.
995-17.5Blank-Out Signs: BOS must have a black exterior finish (FED-STD-595-
37038) with a reflectance value not exceeding 25%. Overhead BOS must include a visor.
995-17.6Electronic Speed Feedback Signs: The ESFS display background must be flat
black (FED-STD-595-37038) with a reflectance value not exceeding 25%. ESFS must utilize
amber LEDs with a peak wavelength of 590 nanometers. ESFS shall have a minimum one-inch
contrasting margin around illuminated characters or graphics.
995-17.6.1 Speed Detector: The ESFS must be programmable for the posted
speed limit and the maximum speed to display. When the detected speed exceeds the maximum
programmed speed (high speed cut-off) threshold, the display must automatically blank.
Alternately, the display may show an alert message such as “SLOW DOWN” when speeds
above the maximum programmed speed threshold are detected. The ESFS must detect when the
posted speed is exceeded by one mph and then activate the alert. When the alert is activated, the
display must flash at a rate of 50 to 60 cycles per minute. When no advancing traffic is detected,
the display must be blank. The speed detector must not activate alerts or display speeds for
vehicles outside the display’s cone of vision. The ESFS must meet the requirements of FCC
Part 90 and not require an FCC operating license. The speed detector must operate on 10.8 to
1263FY 2023-24Return to Table of Contents
16.6VDC. The ESFS must be capable of measuring speeds of approaching traffic between 10 and
99 mph with an accuracy of plus or minus one mph, 1,000 feet in advance of the sign.
995-18Sign Beacon
995-18.1General: Flashing beacon assemblies incorporating a circular traffic signal
must meet the design and functional requirements set forth in MUTCD Chapter 4L. All circular
beacons must have a minimum nominal diameter of 12 inches and meet the requirements of
Section 650. All beacons must use a LED light source.
995-18.1.1 School Zone Beacon: Beacons designed for use with school zone
signing must include a means of calendar scheduling to program days and times of operation.
995-18.1.2 Vehicle Activated Beacon: Vehicle activated beacons must utilize a
vehicle detection system listed on the APL.
995-18.1.3 Pedestrian Activated Beacon: Pedestrian activated beacons must
utilize a pedestrian detector listed on the APL.
995-18.2Cabinets, Housings, and Hardware: Flashing beacon cabinets must be
currently listed on the APL or meet the requirements of Section 676.
All housings, other than pole-mounted cabinets, must be powder coated dull black
(FED-STD-595-37038) with a reflectance value not exceeding 25% as measured by
ASTM E1347. Cabinets and housings must prevent unauthorized access.
Flashing beacon assemblies must allow installation on 4-1/2 inch outer diameter
posts.
Ensure all exposed assembly hardware including nuts, bolts, screws, and locking
washers less than 5/8 inch in diameter, is Type 304 or 316 passivated stainless steel and meets
the requirements of ASTM F593 and ASTM F594. All assembly hardware greater than or equal
to 5/8 inch in diameter must be galvanized and meet the requirements of ASTM A307.
995-18.3Electrical Specifications: Provide equipment that operates on solar power or a
nominal voltage of 120 VAC. If the device requires operating voltages of less than 120 VAC,
supply the appropriate voltage converter. Solar powered beacon systems must be designed to
provide 10 days of continuous operation without sunlight and must automatically charge
batteries and prevent overcharging and over-discharging. Solar powered systems must include a
charge indicator.
995-18.4Environmental Specifications: All electronic assemblies must operate as
specified during and after being subjected to the transients, temperature, voltage, humidity,
vibration, and shock tests described in NEMA TS 4-2016, Section 2. All electronic equipment
must comply with FCC Title 47 Subpart B Section 15.
995-18.5Warranty: Ensure all flashing beacons have a manufacturer’s warranty
covering defects for a minimum of three years from the date of final acceptance in accordance
with 5-11 and Section 608. Ensure the manufacturer will furnish replacements for any part or
equipment found to be defective during the warranty period at no cost to the Department or
maintaining agency within 30 calendar days of notification.
995-19In-Street Signs
995-19.1General: In-Street signs consist of the R1 6a or R1 6c In Street Pedestrian
Crossing Sign assemblies including the sign base.
995-19.2Materials: The sign assembly includes the vertical panel, retroreflective sign
sheeting, a rebounding boot support, and a base. The vertical panel is bolted to a flexible boot 1264FY 2023-24Return to Table of Contents
which is fastened to a plastic, recycled PVC, or rubber base. The sign assembly shall contain no
upright metal parts.
The vertical panel shall yield (bend) fully upon vehicle impact, then return to
vertical position plus or minus 10 degrees with no delaminating. The face of the vertical panel
shall resist twisting and remain oriented to the installed direction after vehicle impact. The
vertical panel shall not split, crack, break, or separate from base. Use only UV stabilized, ozone
and hydrocarbon resistant outdoor-grade thermoplastic polymer, polycarbonate, recycled PVC,
or HDPE materials. UV stabilization testing shall be in accordance with ASTM D1435.
Use Type XI fluorescent yellow-green retroreflective sign sheeting meeting the
requirements of Section 994 on both sides of the vertical panel. The surface of the panel shall be
smooth and free of defects, suitable for adherence of appropriate retroreflective sheeting.
995-19.2.1 Base:
995-19.2.1.1 Sign Base (Fixed): The base shall be constructed with high-
impact materials using ozone and hydrocarbon resistant outdoor grade thermoplastic polymer,
polycarbonate, or HDPE materials meeting the general provisions for all In-Street sign bases.
995-19.2.1.2 Sign Base (Portable): Portable base assemblies shall consist
of a lightweight plastic, recycled PVC, or rubber material that may be easily moved or relocated
by a single person.
995-19.2.1.3 Color: Sign bases shall be either black, or the same color as
the adjacent pavement marking.
995-19.2.2 Approved Product List (APL): In addition to the APL requirements
of 995-1.2, provide the following:
995-19.3Vertical Panel Messages: Fabricate vertical panel messages in accordance with
Section 994. Vertical panels of 8 inches wide x 28 inches tall or 12 inches x 36 inches are
acceptable. See Standard Plans Section 700-102.
995-19.4Connection Method: Products will be categorized as either Fixed Base or
Portable. Fixed base will be installed in accordance with the manufacturer’s instructions.
Portable base will be limited to temporary applications at school crossings where a crossing
guard is present during school arrival and departure times or when children are present. 1265FY 2023-24Return to Table of Contents INTELLIGENT TRANSPORTATION SYSTEM DEVICE MATERIALS
996-1Description
This Section governs the requirements for all perman ent intelligent transportation system devices.
996-2Video Equipment
996-2.1General: All CCTV camera equipment shall be listed on the Department’s
Approved Product List (APL). Manufacturers seeking evaluation of their product shall submit an application in accordance with Section 6. All equipment shall be permanently marked with manufac turer name or trademark, part number, and date of manufacture or serial number. All parts shall be constructed of corrosion -resistant materials, such as plastic, stainless steel, anodized aluminum, brass, or gold-plated metal. All fasteners exposed to the elements shall be Type 304 or 316 passivated stainless steel.
996-2.2CCTV Camera :
996-2.2.1 Camera: CCTV cameras shall be compliant with the Code of Federal Regulations Section 200.216 Prohibition on certain telecommunications and video surveillance services or equipment https://www.ecfr.gov/current/title -2/subtitle-A/chapter -II/part- 200/subpart -C/section -200.216. CCTV cameras shall be compatible with the current version of the Department’s SunGuide® software system. Camera types include dome pan -tilt-zoom (PTZ), external positioner -PTZ, and fixed. Video types include analog and internet protocol (IP).Analog camera produces National Television System Committee (NTSC) composite video output of 1V peak-to-peak (Vp-p) at 75 ohms with a minimum resolution of 470 horizontal and 350 vertical TV lines. Analog and IP cameras shall provide the following features and capabilities:
the areas, objects, and other subjects visible from a roadside CCTV field site. Video produced by the camera is true, accurate, distortion free, and free from transfer smear, oversaturation, and any other image defect that negatively impacts image quality under all lighting and weather conditions in both color and monochrome modes.
average adjustable to 28 dB.
scene through the lens.
to 1/10,000 of a second.
compass display with ability to display pan and tilt position with a 1 degree resolution. 1266 FY 2023-24 Return to Table of Contents
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