This is the 2021 base text. GA issues supplemental specifications that may modify this section — see 2024 Supplemental Specifications ↗ . We have not checked it for changes since this text was ingested — read it before relying on this section. SECTION 925 — Traffic Control Signal Equipment
925.1 General DescriptionFurnish and provide warranty for traffic control signal equipment and materials as specified herein and shown in the contract. The Standard Detail Drawings include information related to the equipment specified in Section 925, as noted in Table 1. Table 1 – Standard Detail Drawing References Detail Name Sheet Inductive Loop Detector Installation TS – 01A Inductive Loop Detector Installation TS – 01B Prefabricated Cabinet Base TS – 02 Pedestrian Facilities Installation TS – 03 Support Structures TS – 04A Support Structures TS – 04B Strain Pole and Mast Arm Foundations TS – 05 Grounding for Traffic Signal Support Structures TS – 06 Utility Clearance TS – 07 Guying TS – 08 Fiber Optics Installation TS – 09 Flashing Beacon Assembly Span Wire Installation TS – 10A Flashing Beacon Assembly Post Mounted Installation TS – 10B 925.1.01 Definitions, Acronyms, and Abbreviations
A. Definitions
1. Advanced Transportation Controller (ATC): The ATC Standards are intended to provide an open
architecture hardware and software platform that can support a wide variety of Intelligent Transportation Systems (ITS) applications including traffic management, safety, security and other applications.
2. Advanced Transportation Controller Cabinet (ATCC): Cabinet that utilizes high-speed serial
communications for an increased number of detection inputs and signal outputs, increased monitoring and diagnostic capabilities, enhanced worker safety, simplified wiring, and reduced cabinet size.
3. CalTrans Cabinet Type L: Type of traffic control device equipment cabinet with an energy-efficient power
supply, reduced circuit breaker sizes, solid state relays, service panel with raw and clean power circuits, main breaker and Uninterruptible Power Supply (UPS) standard interface.
B. Acronyms and Abbreviations
Refer to Sections 101.01 and 647.1.01 for a list of acronyms, abbreviations, and terminology used in this section. 1800
SECTION 925 — Traffic Control Signal Equipment
925.1.01 Related References
A. Department Standard Specifications
1. Section 500 —Concrete Structures 2. Section 639 —Strain Poles for Overhead Sign and Signal Assemblies 3. Section 647 —Traffic Control Signal Installation 4. Section 682 —Electrical Wire, Cable, and Conduit 5. Section 833 —Joint Fillers and Sealers 6. Section 861 —Piling and Round Timber 8. Section 915 —Mast Arm Assemblies 9. Section 922 —Electrical Wire and Cable 10. Section 923 —Electrical Conduit 11. Section 926 —Wireless Communications Equipment 12. Section 935 —Fiber Optic System 13. Section 937 –Detection Systems 14. Section 939 —Communication and Electronic Equipment B. Referenced Documents
Standards and documents referenced throughout this Section are provided in Table 2. Table 2 – Referenced Documents ASTM A 123, Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products ASTM A 153, Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware ASTM A 325, Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength ASTM A 36, Standard Specification for Carbon Structural Steel ASTM A 475, Standard Specification for Zinc-Coated Steel Wire Strand ASTM A 53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless ASTM A 572, Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel ASTM D 2444, Standard Practice for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight) ASTM D 256, Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics ASTM D 543, Standard Practices for Evaluating the Resistance of Plastics to Chemical Reagents ASTM D 638, Standard Test Method for Tensile Properties of Plastics ASTM D 785, Standard Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials ASTM D 790, Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials ATC 5201 v06A.34 Advanced Transportation Controller (ATC), January 12, 2018 1801
SECTION 925 — Traffic Control Signal Equipment
Table 2 – Referenced Documents ATC 5301 v2.02: Advanced Transportation Controller Cabinet (ATCC), March 12, 2019 CalTrans TEES 2009, March 12, 2009 CalTrans TEES 2009, Errata 1, January 21, 2010 CalTrans TEES 2009, Errata 2, December 5, 2014 CalTrans TEES 2009, Errata 3, January 10, 2019 CalTrans TEES 2009, Errata 4, December 4, 2019 Electronic Industries Standards EIA-310-B, Racks, Panels, and Associated Equipment, with 10-32 Universal Spacing threaded holes FCC Part 15 of Title 47 of the CFR, Subpart B, Class B. FHWA Interim Approval for Optional Use of Pedestrian-Actuated Rectangular Rapid-Flashing Beacons at Uncontrolled Marked Crosswalks (IA-21), March 20, 2018 The Department’s QPL The Department’s QPL-75, Polyurethane Sealant for Inductive Loops IEEE/ANSI C.62.41 Surge Suppression IMSA Specification #50-2, Polyethylene insulated, polyethylene jacketed, loop detector lead-in cable IMSA Specification #51-1, Polyvinyl chloride insulated, nylon jacketed loop detector wire IMSA Specification #51-3, Cross linked polyethylene insulated loop detector wire IMSA Specification #51-7, Cross linked polyethylene insulated loosely encased in a polyvinyl chloride or a polyethylene tube loop detector wire ITE Pedestrian Traffic Control Signal Indicators – Light Emitting Diode (LED) Signal Modules, February 2011 ITE Vehicle Traffic Control Traffic Signal Faces – Part 3: Light Emitting Diode (LED) Vehicle Arrow Traffic Signal Modules, Current Edition ITE Vehicle Traffic Control Traffic Signal Indications Specification, Current Edition ITE Vehicle Traffic Control Traffic Signal Indications: Light Emitting Diode (LED) Circular Signal Supplement, Current Edition Manual on Uniform Traffic Control Devices, Federal Highway Administration, latest edition. NEMA Standard Publication TS 2-1998, Traffic Controller Assemblies with NTCIP Requirements Pedestrian Traffic Control Signal Indicators-Light Emitting, ITE, Current Edition State of California Business, Transportation & Housing Agency Traffic Signal Control Equipment Specifications (TSCES), January 1989 edition and applicable addenda UL 493, Standard Thermoplastic-Insulated Underground Feeder and Branch-Circuit Cables UL 94, Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances 1802
SECTION 925 — Traffic Control Signal Equipment
925.1.02 Submittals Refer to Section 647.1.03 for submittal requirements. Requirements for traffic signal equipment, materials, and components are specified herein.
925.2 Materials925.2.01 General Requirements
A. General
1. Provide equipment that is new and not refurbished.
2. All equipment and equipment applications shall meet MUTCD requirements.
3. Provide device that complies with the limits of a Class A digital device, pursuant to FCC Part 15.
B. Materials Warranty
1. Refer to Section 647.3.02 for warranty transfer information to the Department. 2. The equipment provided under this section is warranted by the manufacturer to be free from defects in
materials and workmanship for a minimum period of two years from date of receipt or one year from date of Maintenance Acceptance Letter, whichever is greater.
3. Exceptions for materials that have longer warranty durations is presented in Table 3.
Table 3 – Exceptions to Materials Warranty Requirements Pedestrian and LED Traffic Signal Face Indications LED traffic signal modules and LED pedestrian modules are performance warranted to follow the ITE and CalTrans minimum intensity standards for LED traffic signal modules, measured at 120 VAC and 165ºF (74°C), for a period of 5 years. Manufacturer’s name, part number, date code, and electrical characteristics of the LED signal module shall be visible on the unit for warranty purposes. UPS Manufacturers shall provide a two-year factory-repair warranty for parts and labor on the UPS from date of acceptance by the Department
4. The manufacturer shall repair or replace faulty equipment during the warranty period at no charge to the
Department for parts, labor, and shipping to and from the factory.
C. Environmental
1. All equipment assemblies outside of the controller or flasher cabinet shall be placed in a NEMA Type 3R or 4x
enclosure, unless specified otherwise in this section.
2. All equipment shall meet or exceed the temperature and humidity limits per current NEMA TS2 requirements,
unless specified otherwise in this section. 1803
SECTION 925 — Traffic Control Signal Equipment
925.2.02 Controller Assembly Requirements
A. General
1. Documentation
a. Provide manuals that document the controller programming, operation, and maintenance.
b. Include schematic drawings and pin assignment charts in the manuals to support maintenance activity.
c. Include all components, including communications modules, in documentation.
d. Required documentation includes the documentation listed in Section 1.2.4 in the CalTrans TEES 2009.
2. Configuration
a. Provide controller assembly that conforms with the input and output configurations shown in this section.
b. Program the default input and output configurations shown in this section.
3. Testing
a. Perform testing and provide complete testing results of the controller unit before it is shipped. If the
controller unit is shipped with application firmware installed, it must be tested with the application (e.g., traffic signal control).
b. If a random sample of greater than 10% of the units tested fails, then the whole shipment shall be
rejected, and the vendor will be responsible for the cost to test and repair the units.
B. Type 2070 Controller
1. 2070 controller assembly shall meet the State of California Business, Transportation, and Housing Agency;
Department of Transportation TEES, 2009.
2. Provide Type 2070LX controller assembly with the following I/O configuration.
a. CPU module version 2070-1C Single-Board.
b. Power supply module versions 2070-4A or 2070-4N.
c. Field I/O module version 2070-2E or 2070-E+.
d. Front panel assembly version 2070-3B.
C. ATC Controller
1. ATC controller assembly shall meet ATC 5201 v06A.34.
2. As part of the submittal package, provide detailed information regarding the CPU module, power supply
module, field I/O module and front panel assembly. 925.2.03 Type 2070 Controller Subassembly Requirements
A. CPU Module
1. Provide single-board CPU module version 2070-1C in conformance with CalTrans TEES 2009 with Errata 1, 2,
3, and 4.
2. Provide CPU module that contains the required files to be compatible with the Department’s current
applications software.
3. Provide CPU module with a minimum of two (2) RJ-45 Ethernet ports.
1804
SECTION 925 — Traffic Control Signal Equipment
B. Power Supply Module
1. Provide power supply module version 2070-4A or 2070-4N in conformance with CalTrans TEES 2009
including Errata 1, 2, 3 and 4.
2. The power supply module may be supplied as a separate item.
3. The power supply module shall be an independent, self-contained module.
4. Provide power supply module that is vented and cooled by convection only.
5. Provide power supply module that slides into power supply compartment from the back of the chassis and is
attached to the backplane mounting surface with four #3 TSD thumbscrews.
6. Provide power supply module shall supplies a minimum of 10A of +5 VDC.
7. Provide power supply module that is compatible with Model 2070LX controller assembly and the
Department’s current traffic signal or ramp meter operating system.
8. Mark the model of the power supply module clearly on the unit.
C. Field I/O Module
1. Provide field I/O module version 2070-2E or 2070-E+ in conformance with CalTrans TEES 2009 with Errata 1
and 2, 3 and 4.
2. The field I/O module may be supplied as a separate item.
3. Provide field I/O module that consists of the field controller unit; parallel input/output ports; other module
circuit functions (includes muzzle jumper); serial communication circuitry; module connectors C1S, C11S, and
C12S mounted on the module front plate; VDC power supply (+12 VDC to +5 VDC); and required software.
4. Provide field I/O module configuration jumpers that are compatible with the Department’s current traffic signal
software.
5. Verify that the field I/O module functions with a Model 2070LX controller assembly and compatible with the
Department’s current traffic signal software.
D. Front Panel Display Module
1. Provide front panel assembly version 2070-3B CalTrans TEES 2009 including Errata 1, 2, 3 and 4.
2. The front panel display module may be supplied as a separate item.
3. Provide a front panel display module that includes a front panel assembly controller, two keyboards, AUX
switch alarm bell, and 8 line by 40-character display.
4. Provide a panel with latch assembly and two TSD #1 thumbscrews hinge attachments, assembly PCB,
external serial port connectors, CPU active LED indicator, contrast adjustment, and front panel harness.
5. Verify front panel display module configuration jumpers are compatible with the Department’s current traffic
signal software.
6. Verify the front panel display module functions with a Model 2070LX controller assembly and is compatible
with the Department’s current traffic signal software.
7. Verify the hardware hinge attaching devices mate with existing 2070 assemblies.
8. Verify the front panel harness is connected to the front panel via a removable connector.
9. Verify the front panel connector supports the auxiliary switch.
1805
SECTION 925 — Traffic Control Signal Equipment
925.2.04 Signal Monitor for L Series Traffic Signal Cabinets
A. General
1. Provide signal monitor that complies with specifications outlined in the referenced CalTrans TEES 2009 with
Errata 1, 2, 3, and 4. This specification governs where differences occur.
2. Provide a signal monitor that can monitor 18 channels, as required by the Contract at each location. Eash
monitored output shall consist of the green, yellow, and red inputs for each channel.
3. Conflict Monitoring
a. The signal monitor shall detect the presence of conflicting green or yellow signal voltages on the AC field
terminals between two or more non-compatible channels.
b. A conflict fault (CONFLICT) shall be a latching fault.
4. Conflict Recognition Time
a. The signal monitor shall trigger a CONFLICT when voltages on conflicting channels are present for more
than 500 ms.
b. The signal monitor shall not trigger a CONFLICT when voltages on conflicting channels are present for
less than 200 ms. Conflicting signals sensed for more than 200 ms and less than 500 ms may or may not
trigger the unit.
5. 24 VDC Monitoring VDC
a. The signal monitor shall detect when the cabinet +24 VDC supply falls below 18 VDC.
b. A 24 VDC failure (VDC FAIL) shall be a latching fault.
6. 24 VDC Recognition Time
a. The signal monitor shall trigger VDC FAIL when the voltage on the +24V input is below 18 VDC for more
than 500 ms.
b. The signal monitor shall not trigger VDC FAIL when the voltage on the +24V input is below 18 VDC for
less than 200 ms. A voltage level of +22 VDC will be required to prevent the unit from triggering.
7. Controller Watchdog Monitoring (WDT)
a. The signal monitor shall trigger when the controller unit’s watchdog input does not toggle within the
programmed time period (WDT ERROR).
b. A WDT ERROR shall be a latching fault.
c. The signal monitor remains latched in the fault state until reset by the reset button, an external reset input
command, or AC line voltage restoring from an AC line brownout event.
d. A reset resulting from an AC line brownout event shall not clear the WDT ERROR.
8. Controller Watchdog Latch Option
a. The signal monitor shall have a programming option that sets the watchdog monitoring function to a
latching mode and only resets by the manual the reset button or external reset input.
b. An AC line brownout condition shall not reset the fault.
9. Controller Watchdog Recognition Time
a. The signal monitor shall have a programming option that sets the maximum watchdog recognition time to
1,000 to 1,500 ms, ±100 ms.
10. Controller Watchdog Enable Switch
a. Provide an internal switch to disable the watchdog monitoring function.
b. Mount the switch on the PCB and clearly label WD ENABLE - ON...OFF.
c. Placing the switch in the OFF position shall inhibit watchdog monitoring.
1806
SECTION 925 — Traffic Control Signal Equipment
11. WDT ERROR LED Control
a. The WDT ERROR LED shall illuminate when the unit has been triggered by a watchdog fault.
b. If the watchdog monitoring function is inhibited due to the watchdog enable switch, the WDT ERROR LED
shall flash at a 0.5 Hz rate.
12. AC Line Monitoring
a. AC Line Brownout Recognition
i. Verify that the signal monitor can detect that the AC line has fallen below 98 ±2 VAC for greater than
400 ±50 ms. This shall force the output relay to the de-energized fault state, enable the stop-time
output, and cause the AC POWER LED to flash at a 2 Hz rate.
ii. Verify that the unit maintains this state until the AC line voltage rises above 103 ±2 VAC for greater
than 400 ±50 ms.
iii. Provide a jumper option that will change the AC brownout dropout level to 92 ±2 VAC and the restore
level to 98 ±2 VAC.
b. AC Line Power-up and Brownout Delay Time
i. When the AC Line is greater than 103 ±2V after power-up or brownout restore, verify that the Signal
Monitor holds the output relay in the de-energized fault state and enable the stop-time output for a
period of not less than 6.0 ±0.5 sec and not greater than 10.0 ±0.5 sec.
13. Red Fail Monitoring
a. The Signal Monitor shall detect the absence of an active voltage on the green, yellow and red field signal
inputs of a channel.
b. Red fail fault (RED FAIL) shall be a latching fault.
14. Red Fail Recognition Time
a. Verify the Signal Monitor triggers when an active voltage on one of the three inputs of a channel is absent
for more than 1,500 ms.
b. Verify that the Signal Monitor does not trigger when an active voltage on one of the three inputs of a
channel is absent for less than 1,200 ms. Channels without proper voltages sensed for more than 1,200
ms and less than 1,500 ms may or may not trigger the unit.
c. Provide an option switch (RF 2010) that will change the fault recognition time to between 700 ms and
1,000 ms.
15. Dual Indication Monitoring
a. Verify that the Signal Monitor can detect the presence of active voltage on the green and yellow field
signal inputs of a channel.
b. Green/Yellow/Red (GYR) Dual Indication fault (DUAL IND) shall be a latching fault.
c. When selected by the GYR ENABLE switch, verify that the GY Dual Indication monitoring function is
disabled when pin #EE is active.
16. Dual Indication Recognition Time
a. Verify that the Signal Monitor triggers when multiple inputs are active on a channel for more than 500 ms.
b. Verify that the Signal Monitor does not trigger when multiple inputs are active on a channel for less than
250 ms. Channels with multiple voltages active for more than 250 ms and less than 500 ms may or may
not trigger the unit. 1807
SECTION 925 — Traffic Control Signal Equipment
17. Clearance (Short or Absent Yellow) Monitoring
a. Verify that the Signal Monitor can detect that a channel has not provided a yellow clearance interval
during a green to yellow to red sequence.
b. A sequence failure (SEQUENCE) shall be a latching fault.
c. Verify that the sequence monitoring function is enabled for all selected channels except when the Red
Enable input is not active or pin #EE is active.
18. Clearance Recognition Time
a. Verify that the yellow clearance interval is a minimum of 2.7 sec.
19. Flickering Indication Detection
a. Verify that the Signal Monitor provides a method of detecting Conflict, Red Fail, and Dual Indication faults
that result from intermittent or flickering signal inputs that may not meet the minimum duration requirement.
b. The flickering indications shall result in a latching fault with an indication illuminated along with the
resulting Conflict, Red Fail, or Dual Indication indicator.
20. Configuration Change Monitoring
a. On power-up, reset, and periodically during operation, verify that the Signal Monitor compares the current
configuration settings with the previously stored value and if the settings have changed, the Signal
Monitor automatically logs the new setting.
b. Verify that the settings include the permissive diode matrix, switches, jumpers, and the Watchdog
Enable switch.
c. Provide a programming option such that change in the configuration parameters will cause the Signal
Monitor to enter the fault mode, causing the output relay contacts to close and enabling the stop-time
output to the controller.
d. To indicate the fault mode, verify that the PCA indicator will flash at a 4 Hz rate.
e. Depressing the Reset button for a minimum of 5.0 sec is required to clear the fault and log the new
configuration parameters.
f. If the programming option is not selected, verify that the unit does not set the fault mode but will still log
the configuration change.
21. Exit Flash
a. When the Signal Monitor exits the flash state (output relay de-energized) as a result of a Reset command
or AC Line brownout restore, verify that the stop-time output goes to the inactive state 250 ±50 ms before
the output relay transfers to the energized state.
b. The transition shall provide an early indication to the controller unit that the cabinet will transfer from flash
to signal operation.
22. Display Functions
a. Verify that it is possible to view the active channels for each individual color (GYR) during operation and
when latched in a fault state.
b. When the Signal Monitor is latched in a fault state, verify that it is also possible to view the active
channels for each individual color and fault status for each channel for the current fault and the two
previous faults.
i. When triggered by a fault, the channel status display shall alternate between the channels that were
involved in the fault (fault status) for 2 sec and the field signals active at the time of the fault for 6 sec.
ii. The channels involved in the fault shall flash their respective green, yellow, and red indicators
simultaneously at a 4 Hz rate for the 2 sec interval.
iii. The two previous faults may also be displayed individually. 1808
SECTION 925 — Traffic Control Signal Equipment
iv. The status is not reset by an AC Line power interruption.
v. To enter the display mode, remove the program card. The sequence is shown in Table 4.
Table 4 – Sequence of Display Mode
Reset Event PCA LED Fault Status LEDs Channel Status LEDs
--- #1 Single flash Current Fault Status (newest) Current Field status
#1 #2 Double flash Event #2 Fault Status Event #2 Field status
#2 #3 Triple flash Event #3 Fault Status (oldest) Event #3 Field status
(repeats back to top)
23. Event Logging Functions
a. Verify that the Signal Monitor can store a minimum of 100 events in non-volatile memory.
b. Mark each event with the time and date of the event. The events consist of fault events, AC Line events,
reset events, and configuration change events.
c. Provide a graphical means of displaying the signal states of all field inputs for 30 sec prior to a fault
trigger event.
d. Provide the capability to assign a four-digit identification number to the unit.
e. Upload the event logs to a PC using the RJ-45 of the Signal Monitor and provided.
f. Verify each event log report contains the following information:
i. Monitor ID#: a four-digit (0000-9999) ID number assigned to the monitor.
ii. Time and Date: time and date of occurrence.
iii. Event Number: the record number in the log. Event #1 is the most recent event.
24. Monitor Status Report (CS): Verify the Current Status report contains the following information:
a. Fault Type: the fault type description.
b. Field Status: the current green, yellow, or red (GYR) field status and field RMS voltages (Vrms) if the
monitor is not in the fault state, or the latched field status and field RMS voltages and fault channel status
at the time of the fault.
c. Cabinet Temperature: the current temperature if the monitor is not in the fault state, or the latched
temperature at the time of the fault.
d. AC Line Voltage: the current AC Line voltage if the monitor is not in the fault state, or the AC Line voltage
at the time of the fault.
e. Control Input Status: the current state and RMS voltages of the Red Enable input, EE input, and Special
Function #1 and #2 inputs if the monitor is not in the fault state, or the status latched at the time of the fault.
25. Previous Fault Log (PF): Verify the Previous Fault log contains the following information:
a. Fault Type: the fault type description.
b. Field Status: the latched field status with RMS voltages and fault channel status at the time of the fault.
c. Cabinet Temperature: the latched temperature at the time of the fault.
d. AC Line Voltage: the AC Line voltage at the time of the fault.
e. Control Input Status: the latched state of the Red Enable input, EE input, and Special Function #1 and #2
inputs at the time of the fault. 1809
SECTION 925 — Traffic Control Signal Equipment
26. AC Line Event Log (AC): The AC Line log shall contain the following information:
a. Event Type: the type of AC Line event that occurred.
i. Power-up—AC on, monitor performed a cold start
ii. Interrupt—AC Line < Brownout level
iii. Restore—AC restored from brownout or interruption (AC Off), no cold start
b. AC Line Voltage: the AC Line voltage at the time of the event.
27. Monitor Reset Log (MR): Verify the Monitor Reset log contains the following information:
a. Event Type: The monitor was reset from a fault by the front panel Reset button or External Reset input.
b. Time and Date: the time and date of the event.
28. PC Communications
a. Have the manufacturer provide software to access the Signal Monitor status and event logs.
b. Verify the software operates with the current version of Microsoft Windows.
29. Red Monitoring
a. Red Field Inputs
i. Verify that the Signal Monitor is capable of monitoring 18 Red field signals.
ii. Verify that a Red input is sensed active when the input voltage exceeds 70 Vrms.
iii. Verify that a Red input is sensed not active when the input voltage is less than 50 Vrms. A Red input
may or may not be sensed active when the input voltage is between 50 Vrms and 70 Vrms.
b. Red Enable Input
i. Verify that the Red Enable input provides an AC input to the unit that enables Red Monitoring, Dual
Indication Monitoring, and Sequence monitoring when the input is sensed active.
ii. Verify that the Red Enable input is sensed active when the input voltage exceeds 70 Vrms.
iii. Verify that the Red Enable input is sensed not active when the input voltage is less than 50 Vrms. The
Red Enable input may or may not be sensed active when the input voltage is between 50 Vrms and
70 Vrms.
c. Special Function Preemption Inputs
i. Verify that the Special Function Preemption #1 and #2 inputs provide an AC input to the unit that
disables only Red Fail Monitoring (Lack of Output) when either input is sensed active.
ii. Verify that a Special Function input is sensed active when the input voltage exceeds 70 Vrms.
iii. Verify that a Special Function input is sensed not active when the input voltage is less than 50 Vrms.
A Special Function input may or may not be sensed active when the input voltage is between 50
Vrms and 70 Vrms.
iv. Use a PCB-mounted switch to provide the option to invert the active status of the Special Function
#1 input.
v. Verify that the Special Function #1 input is sensed active when the input voltage is less than 50 Vrms.
The Special Function #1 input may or may not be sensed active when the input voltage is between 50
Vrms and 70 Vrms.
d. Red Interface Connector
i. Provide connector with the required inputs for the unit to monitor the red field signal outputs.
ii. Verify the connector is a 20-pin connector that mates with the P20 Cable from the output file.
iii. Provide a high-quality connector that is polarized to verify proper mating with the cable. 1810
SECTION 925 — Traffic Control Signal Equipment
iv. Verify ejector latches are included to facilitate removal and prevent the cable from inadvertently
disconnecting.
v. Verify the unit functions as a standard 210 Signal Monitor when the cable is disconnected.
vi. Use the pin assignments shown in Table 5.
Table 5 – Red Interface Connector Pin Assignments
Pin Function Pin Function
1 Channel 15 Red 11 Channel 9 Red
2 Channel 16 Red 12 Channel 8 Red
3 Channel14 Red 13 Channel 7 Red
4 Chassis Ground* 14 Channel 6 Red
5 Channel 13 Red 15 Channel 5 Red
6 Special Function #2 16 Channel 4 Red
7 Channel 12 Red 17 Channel 3 Red
8 Special Function #1 18 Channel 2 Red
9 Channel 10 Red 19 Channel 1 Red
10 Channel 11 Red 20 Red Enable
*A jumper option shall be provided to enable the connection of Pin #4 to be made with Chassis Ground.
30. Front Panel
a. Verify the model information is permanently displayed on the front surface.
b. Verify the front panel is constructed of aluminum with a minimum thickness of 0.090 in. (2.3 mm) and
finished with an anodized coating.
c. Verify that all display indicators are mounted on the front panel of the Signal Monitor and are water clear,
T-1 package, Super Bright type LEDs.
d. Verify that all fault LEDs are red except the AC POWER indicator, which is green.
e. Provide a separate red, yellow, and green indicator for each channel.
f. Label the indicators and provide the information as follows:
i. AC Power: Verify the AC Power indicator flashes at a rate of 2 Hz when the unit has detected a low
voltage condition as described in Section 925.2.04.A.13. Verify the AC POWER indicator flashes at a
rate of 4 Hz during the minimum flash interval. Verify that the indicator illuminates when the AC Line
voltage level is restored above the brownout level. Verify the indicator extinguishes when the AC Line
voltage is less than 80 VAC.
ii. VDC Failed: Verify the VDC FAILED indicator illuminates when a 24 VDC fault condition is detected.
The indicator remains extinguished if the monitor has not been triggered by a 24 VDC fault.
iii. WDT Error: Verify the WDT ERROR indicator illuminates when a controller Watchdog fault is
detected. Verify the WDT Error indicator flashes ON once every 2 sec if the WD Enable switch on the
monitor is placed in the OFF position to disable Watchdog monitoring, or the AC Line voltage is
below the Watchdog disable level.
iv. Conflict: Verify that the CONFLICT indicator illuminates when a conflicting signal fault is detected. 1811
SECTION 925 — Traffic Control Signal Equipment
v. Diagnostic: Verify the DIAGNOSTIC indicator illuminates when one of the following faults is detected:
Internal Watchdog fault, Memory Test fault, or Internal power supply fault. The indicator is intended to
inform the service technician of a monitor hardware or firmware failure.
vi. Red Fail: Verify the RED FAIL indicator illuminates when an absence of signal is detected on a
channel. Verify the RED FAIL indicator flashes ON once every 2 sec if the RED ENABLE input is not
active, or a Special Function input is active, or the EE input is active
vii. Dual IND: Verify the Dual IND. indicator illuminates when a GY-Dual or GYR-Dual Indication fault is
detected on a channel.
viii. Clearance: Verify the Sequence indicator illuminates when the minimum yellow clearance time has
not been met on a channel.
ix. PCA: Verify the PCA indicator illuminates if the program card is absent or not properly seated. If the
unit is in the Diagnostic Display mode, verify the PCA indicator flashes ON (once, twice, or three
times) to indicate the fault event number being displayed.
x. RP Detect: Verify the RP DETECT indicator illuminates when the unit has detected a Conflict, Red
Fail, or Dual Indication fault as a result of recurring pulse field inputs.
xi. Channel Status: Verify that during normal operation the 48 channel status indicators display all active
signals (red, green, and yellow). In the fault mode, verify that the Channel Status indicators display all
signals active at the time of the fault for 6 sec and then indicate the channels involved in the fault for 2 sec.
31. Front Panel Control-Reset Button
a. Provide a momentary single pole, single through switch labeled RESET on the unit front panel to reset the
monitor circuitry to a non-failed state.
b. Position the switch on the front panel such that the switch can be operated while gripping the front
panel handle.
c. Verify that a reset command issued from either the front panel button or External Reset input is a one-
time reset input to prevent the unit from constant reset due to a switch failure or constant external input
and causes all LED indicators to illuminate for 300 ms.
d. Verify the Reset button provides control of the Diagnostic Display mode.
32. Electronics
a. RMS Voltage Sampling
i. Use high speed sampling techniques to determine the true RMS value of the AC field inputs.
ii. Sample each AC input at least 32 times per cycle.
iii. Verify that the RMS voltage measurement is insensitive to phase, frequency, and waveform distortion.
b. Internal MPU Watchdog
i. Use a microprocessor for all timing and control functions.
ii. Verify continuing operation of the microprocessor by an independent monitor circuit that forces the
output relay to the de-energized fault state, enables the stop-time output, and illuminates the
DIAGNOSTIC indicator if a pulse is not received from the microprocessor within 300 ms.
iii. If the microprocessor resumes operation, verify the Signal Monitor continues to operate.
iv. Verify that the monitoring circuit is also configurable to latch in the fault state.
v. Verify the unit requires a power-up cycle to reset the circuit once it is triggered.
1812
SECTION 925 — Traffic Control Signal Equipment
c. Sockets
i. Provide only PROM memory device for the microprocessor firmware is socket mounted.
ii. Verify that the PROM memory socket is a precision screw machine type socket with a gold contact
finish that provides a reliable gas tight seal. Low insertion force sockets or sockets with wiper type
contacts are not acceptable.
d. Internal Power Supply
i. Use a built-in, high-efficiency switching power supply to generate required internal voltages.
ii. Verify that all supply voltages are regulated.
iii. Failure of the internal power supply to provide proper operating voltages shall force the output relay to
the de-energized fault state, enable the stop-time output, and illuminate the DIAGNOSTIC indicator.
iv. Provide a user replaceable slow blow fuse for the AC Line input.
v. Provide unit that is operational over the AC Line voltage range of 75 VAC to 135 VAC.
33. RJ-45 Interface
a. The RJ-45 port interface shall be electrically isolated from all monitor electronics except chassis ground.
34. Configuration Parameters
a. Select user-programmed configuration settings using PCB-mounted switches or jumpers. Designs
requiring a PC to program or verify the configuration parameters are not acceptable.
b. Verify that user-programmed configuration settings that are transferred to memory are stored in a PROM
or EEPROM. Designs using a battery to maintain configuration data are not acceptable.
35. Field Terminal Inputs
a. Verify that all 120 VAC field terminal inputs provide an input impedance of 50K to 150K ohms.
b. Verify 120 VAC field terminal inputs are terminated with a discrete resistor having a power dissipation
rating of 0.5 W or greater and a voltage rating exceeding 350 V.
36. Printed Circuit Boards
a. Verify that all printed circuit boards meet the requirements of the California TSCES, January 1989.
b. Meet the following requirements.
i. All plated-through holes and exposed circuit traces are plated with solder.
ii. Both sides of the printed circuit board are covered with a solder mask material.
iii. The circuit reference designation for all components and the polarity of capacitors and diodes are
clearly marked adjacent to the component.
iv. Verify Pin #1 for all integrated circuit packages is designated on both sides of all printed circuit
boards.
v. All electrical mating surfaces are gold plated.
vi. All printed circuit board assemblies are coated on both sides with a clear moisture-proof and fungus-
proof sealant.
vii. All components and wire harnesses are mounted to the PCB using plated holes. Piggy back
connections or jumper wires are not acceptable. 1813
SECTION 925 — Traffic Control Signal Equipment
B. Type 2018 Signal Monitor
1. Provide Model 2018 Monitor Unit in accordance with CalTrans TEES 2009 with Errata 1, 2, 3 and 4.
2. Meet the following requirements for monitor functions.
a. Conflict Monitoring
i. Verify that programming of the permissive matrix is contained in the memory key.
ii. AC Line Power-up and Brownout Delay Time
a. Verify that the flash interval is terminated after at least 6.0 ±0.5 sec if the Signal Monitor has
detected at least five transitions of the Watchdog input.
b. If the Signal Monitor does not detect five transitions of the Watchdog input before 10.0 ±0.5 sec,
verify that the Signal Monitor goes to the fault state.
c. During the interval, verify that the AC POWER LED flashes at a 4 Hz rate.
d. Verify that the memory key Minimum Flash Time parameter has a range of zero and from 6 to 16 sec.
b. Red Fail Monitoring
i. Verify that the Red Fail monitoring function is enabled in the memory key on a per channel basis
except when the Red Enable input is not active, or pin #EE is active, or Special Function #1 input is
active, or Special Function #2 input is active.
c. Red Fail Recognition Time
i. Verify that a memory key Red Fail Timing option is provided that will change the fault recognition time
between 700 ms and 1,000 ms.
d. Red Interface Cable Fault
i. Provide a memory key programming option such that operating without the Red Interface cable
installed causes the Signal Monitor to enter the fault mode, causing the output relay contacts to close
and enabling the stop-time output to the controller.
ii. To indicate the fault mode, verify that the Red Fail indicator is illuminated with all fault channel
indicators off.
iii. Verify that Red Fail preemption control to the monitor uses the Special Function #1 or #2 input.
e. Dual Indication Monitoring
i. Verify the function is enabled in the memory key on a per channel basis for green and yellow
combinations, green and red combinations, and yellow and red combinations.
ii. Verify that the GYR Dual Indication monitoring function is enabled for all selected channels except
when the Red Enable input is not active or pin #EE is active.
f. GY Dual Indication Monitoring
i. Enable the function with a dip switch on the PCB labeled GY ENABLE.
ii. When the switch is in the ON position, monitor all channels for simultaneous active green and yellow
inputs on a channel.
g. Clearance (Short or Absent Yellow) Monitoring
i. Verify that the function is enabled in the memory key on a per channel basis.
h. Flickering Indication Detection
i. Provide a programming option on the memory key to disable the RP Detect function.
1814
SECTION 925 — Traffic Control Signal Equipment
i. Memory Key Error
i. Verify that when the memory key is removed or when a nonvalid Memory key is inserted, the Signal
Monitor forces the output relay to the de-energized fault state, enables the stop-time output, and
illuminates the KEY indicator.
ii. Verify that a reset command from the front panel Reset switch or External Reset input is required
once a valid memory key is in place.
iii. Verify that failure to read the memory key correctly results in a memory key Error illuminating the KEY
indicator.
j. Display Functions
i. Previous Fault GYR Display
a. To exit the display mode, replace the memory key.
ii. AC Line Event Log (AC): The AC Line log shall contain the following information:
a. Event Type: the type of AC Line event that occurred.
1) Power-up—AC on, monitor performed a cold start
2) Interrupt—AC Line < Brownout level
3) Restore—AC restored from brown-out or interruption (AC Off), no cold start
b. AC Line Voltage: the AC Line voltage at the time of the event.
iii. Configuration Change Log (CF): Verify the Configuration Change log contains the following
information:
a. Memory key contents and additional programming parameters resulting from hardware
configuration settings.
b. Changed items since the last log entry.
c. Time and date of the event.
iv. Signal Sequence Log:
a. Provide a log that graphically displays all field signal states for up to 30 sec prior to the current
fault trigger event.
b. Verify that the resolution of the display is at least 50 ms.
k. Communications Functions
i. Verify that the Signal Monitor is compatible with the protocol of the Department’s current operating
system for 2070 controllers and Central System Control.
ii. Verify the 2018 Conflict Monitor can communicate via a RJ-45 connector (Ethernet).
l. Hardware
i. Monitor Configuration Programming
a. Verify monitor parameter programming is provided in a removable and interchangeable memory
key (nonvolatile memory device) mounted on the front panel.
b. Monitor Unit Serial Memory Key
1) Verify that the monitor has a Datakey model KC4210 Keycepticle socket or equal mounted
on the front panel containing a Datakey model LCK4000-RED serial memory key or equal.
2) (Note: Datakey and Keycepticle are registered trademarks of Datakey Electronics, Inc.)
3) Verify that the serial memory key is rated for –40 to +176°F (–40 to +80°C) operation. 1815
SECTION 925 — Traffic Control Signal Equipment
c. Monitor Unit Serial Memory Key Interface
1) Verify that the Signal Monitor does not provide the capability to program the serial memory
key. It shall be used only as a read only device.
2) Verify that the 16-bit Frame Check Sequence (FCS) procedure defined in clause 4.6.2 of
ISO/IEC 3309 is used to verify the integrity of the read data.
3) Verify that failure to read the serial memory key correctly results in a latched Diagnostic fault.
4) Verify that interface circuitry to the memory utilizes the LOFO switch on the serial memory
key socket to verify the device is removed and inserted with no power applied to the
interface pins (i.e., dead socket).
d. Memory Key Programming Tool
1) Verify the programming tool provides all the electronics necessary to read data from and
write data to the memory key device.
2) Verify the programmer is configured to read and write to the Datakey model LCK4000, which
provides 512 bytes of storage.
3) Verify power for the programming tool is obtained from the PC communications port so that
no external power supply source is required.
e. Memory Key Programming Software
1) Verify that the manufacturer provides software to operate the memory key programming tool.
2) Verify that the memory key programming parameters are stored in a Windows file format
according to currently used Signal Monitor identification number and name.
f. Parameter Forms
1) Provide a parameter form for each programmable Signal Monitor function.
2) Verify that Signal Monitor configuration data is entered on a parameter form and then saved
to the main data buffer image.
3) When all parameter forms are completed verify that a write function transfers the contents of
the data buffer to the nonvolatile memory of the memory key device.
4) Verify that reading the contents of a memory key device sets the parameters of each form for
review or modification.
g. Memory Key Parameter Verify
1) Verify that a memory key Parameter Verify function compares the contents of a memory key
device with parameters in the data buffer. The data buffer parameters may be set by
changing parameters on the forms, reading the contents of a memory key device, or loading
a set of parameters from a file.
h. Initial Parameter Setup Wizard
1) Verify that an Initial Parameter Setup wizard is provided that defines and sets a basic set of
parameters for a new memory key setup.
2) Verify that the wizard asks a series of questions describing basic intersection setup and
develop a template for the following parameters: Red Fail Monitoring, Dual Indication
Monitoring, Clearance Monitoring, and Yellow Disable.
i. Parameter Check Wizard
1) Verify that a Parameter Check wizard is provided that will apply a set of basic configuration
rules to the data buffer and provide a warning that configuration conflicts or inconsistencies
may exist. 1816
SECTION 925 — Traffic Control Signal Equipment
j. Parameter Reports
1) Verify that the contents of the data buffer are displayed in a hex format for numerical
analysis. A text report shall also be printed that specifies all parameter settings.
k. Special Function Preemption Inputs
1) Verify that a programming option is provided in the memory key to invert the active status of
the Special function #1 input. When the option is enabled, verify that the Special Function #1
input is sensed not active when the input voltage exceeds 70 Vrms.
ii. Output Relay
a. Verify the Signal Monitor Output Relay provides both normally open and normally closed contacts.
b. Verify a programming option is provided to select the polarity of the EE input to accommodate
the flash drive voltage state drive on pin EE.
C. Model 208 Monitor Unit for Ramp Meter Cabinets
1. Provide Model 208 Monitor Unit in accordance with CalTrans TEES 2009 with Errata 2, 3 and 4.
2. Meet the following requirements for monitor functions.
a. Verify the Model 208 Monitor Unit reliably senses and causes a relay output contact (FAILED STATE)
when monitoring the following:
i. Watchdog Timer (WDT) Timeout Condition
ii. Cabinet +24 VDC Power Supply below specified threshold
b. WDT Circuitry
i. Provide WDT circuitry to monitor a controller unit output line state routed to the monitor unit at its
assigned pin.
ii. Provide WDT circuitry that senses line state change and the time since the last change.
iii. No state change for 1.5 ± 0.1 sec shall cause a FAILED state.
iv. Provide timer that resets at each state change in a NON-FAILED state.
v. Only the Unit Reset or WDT inactive due to the voltage sense shall reset the WDT from a FAILED state.
vi. A FAILED state caused by the WDT shall illuminate a front panel indicator light labeled WDT ERROR.
The indicator shall remain ON until Unit Reset Issuance.
vii. Provide WDT circuitry that senses the incoming VAC line.
viii. Provide WDT circuitry that inhibits the WDT function when the voltage falls below 98 ±2 VAC for 50
±17 ms.
ix. Provide WDT circuitry that becomes active when the incoming VAC line rises above 103 ±2 VAC for
50 ±2 ms.
x. Verify a hysteresis between the voltage inhibit and the voltage active setting is a minimum of 3V.
c. Power Supply Monitor
i. Provide monitor unit that senses the cabinet +24 VDC power supply output voltage.
ii. Voltages sensed at +18 VDC or below for 500 ms or longer shall cause a FAILED state.
iii. Voltages sensed at +22 VDC or above shall NOT cause a FAILED state.
iv. Voltages sensed below +22 VDC for 200 ms or less shall NOT cause a FAILED state.
v. All timing and voltage conditions other than those specified above may or may not cause a
FAILED state. 1817
SECTION 925 — Traffic Control Signal Equipment
vi. A FAILED state caused by sensing the power supply shall illuminate a front panel indicator light
labeled VDC FAILED.
vii. The indicator shall remain ON until unit reset.
viii. Only unit reset shall reset the power supply sense circuitry from a FAILED state.
d. FAILED State Output Circuits
i. Provide electro-mechanical relay to switch an output circuit during a FAILED state.
ii. The relay coil shall be energized in a NON-FAILED state.
iii. The relay contacts shall be rated for a minimum of 3A at 120 VAC and 100,000 operations.
iv. Contact opening/closing time shall be 30 ms or less.
e. Monitor Unit Reset
v. Provide a momentary SPST CONTROL switch labeled RESET on the unit front panel to reset the
monitor unit circuitry to a NON-FAILED state.
vi. Position the switch on the front panel so that the switch can be operated while gripping the front
panel handle.
vii. The unit shall have provision to drive an external NE2H light through a 56K ohm, 0.5 W Series resistor
(resident on unit).
viii. The WDT Reset Input on the PDA Type 3 cabinet power supply shall not be sensed by the unit.
ix. The output relay CONTACT FOR FAILED STATE shall be OPEN.
3. Provide Model 208 Monitor Unit with pin assignments as shown in Table 6.
Table 6 – Model 208 Monitor Unit Pin Assignments
PIN FUNCTION
1/44 DC Ground
2/43 WDT Ext. Reset
5/40 WDT IN
10/35 +24 VDC
15/30 AC-
17/28 Normally Open, Circ. #2
19/26 AC+
20/25 Normally Closed, Circ. #1
21/24 Circ. Common #1 & #2
22/23 WDT Lamp (External)
NOTE: Card connector keyed between pins 2 and 3 and pins 11 and 12.
925.2.05 Cabinet Monitor Unit for the ATC Cabinet
The Model 2212 CMU shall meet the specifications set forth in Section 6.3 of the ATC 5301 v02.02, March 18, 2019. 1818
SECTION 925 — Traffic Control Signal Equipment
925.2.06 Traffic Control Device Cabinet Assembly Requirements
A. General
The supplied Traffic Control Device Cabinet Assembly shall follow CalTrans cabinet type L as defined in the
CalTrans TEES or the ATCC as defined in the ATC 5301 V2: Advanced Transportation Controller Cabinet (ATCC),
published March 12, 2019.
In addition to the CalTrans L specifications, the provided cabinet assembly shall conform to the additional
requirements listed below. The following supersedes the CalTrans TEES where differences occur.
1. Provide one or more of the cabinet types listed in Table 7 as specified in the Contract.
Table 7 – Traffic Control Device Cabinet Types
Cabinet
Type
Description Minimum Cabinet Dimension Range Number
of Doors
Height Width Depth
332(L) Ground Mounted
Traffic Control
Signal Cabinet
64 in. to 67 in.
(1.62 m to 1.70 m)
23 in. to 26 in.
(0.58 m to 0.66 m)
24 in. to 30 in.
(0.61 m to 0.76 m)
334(L) Ramp Meter
Cabinet
64 in. to 67 in.
(1.62 m to 1.70 m)
23 in. to 26 in.
(0.58 m to 0.66 m)
24 in. to 30 in.
(0.61 m to 0.76 m)
337(L) Compact, Urban
Area Pole
Mounted Traffic
Control Signal
Cabinet
35 in.
(0.89 m)
20 in.
(0.51 m)
17 in.
(0.43 m)
336S(L) Pole Mounted
Traffic Control
Signal Cabinet
44 in. to 47 in.
(1.12 m to 1.20 m)
23 in. to 26 in.
(0.58 m to 0.66 m)
18 in. to 24 in.
(0.46 m to 0.61 m)
342(L) Ground Mounted
Traffic Control
Signal Cabinet
64 in. to 67 in.
(1.62 m to 1.70 m)
44 in. to 46 in.
(1.12 m to 1.17 m)
24 in. to 30 in.
(0.61 m to 0.76 m)
332(ATC) Ground Mounted
Traffic Control
Signal Cabinet
64 in. to 67 in.
(1.62 m to 1.70 m)
23 in. to 26 in.
(0.58 m to 0.66 m)
24 in. to 30 in.
(0.61 m to 0.76 m)
342(ATC) Ground Mounted
Traffic Control
Signal Cabinet
64 in. to 67 in.
(1.62 m to 1.70 m)
44 in. to 46 in.
(1.12 m to 1.17 m)
24 in. to 30 in.
(0.61 m to 0.76 m)
NEMA
Type 3R
Pole Mounted
Flashing Beacon
Cabinet
14 in. to 18 in.
(0.35 m to 0.46 m)
10 in. to 14 in.
(0.25 m to 0.35 m)
12 in. to 15 in.
(0.30 m to 0.38 m)
1819
SECTION 925 — Traffic Control Signal Equipment
2. Cabinets shall be equipped with the base equipment listed in Table 8.
Table 8 – Traffic Control Device Cabinet Base Equipment Requirements
Cabinet Model 332(L) 334(L) 336S(L) 337(L) 342(L) 332
(ATC)
342
(ATC)
Mounting Ground Ground Ground
or Pole Pole Ground Ground Ground
Quantity
Exhaust fans 2 2 2 2 4 2 4
Lower input field termination panel 1 1 1 0 1 1 1
Model 242L DC Isolator in Slot 14 of Upper
Input File 1 0 1 0 1 1 1
Flash Transfer Relays 6 0 4 3 6 6 6
Model 204 Flashers 2 1 2 1 2 2 2
Input Files 2 1 2 1 2 2 2
Output Files 1 1 1 1 1 1 1
Auxiliary Output File Rack 1 0 ** 0 1 1 1
Output/PDA Type 3 with Model 206 24 VDC
Power Supply with flash transfer relay 0 1 0 0 0 0 0
Model 200 Load Switch 0 1 0 0 0 0 0
Model 208 Monitor Unit 0 1 0 0 0 0 0
Laptop Shelf 1 1 1 0 1 1 1
Manual pushbutton assembly 1 1 1 2 1 1
Four Position Power Strip 1 1 1 1 0 0 2
M Base Adapter installed (Base Mount
Cabinets Only) 0 0 * 0 0 0 0
Aluminum Cover Plate for Cabinet Bottom
(Pole Mount Cabinets Only) 0 0 * 0 0 0 0
*One of these options shall be provided with the 336S cabinet per proposed mounting style identified in the
Contract.
**A ground mounted 336S cabinet shall be configured with an auxiliary output file rack.
Other cabinet components such as controllers, monitors, load switches, etc., may be ordered as separate items.
3. Locks
a. Equip the main cabinet door with locks that accept No. 2 Corbin keys.
b. Provide two sets of keys with each cabinet. One set of keys is defined as one No. 2 key and one police
panel (skeleton) key. 1820
SECTION 925 — Traffic Control Signal Equipment
4. Interior Cabinet Lighting
a. Include LED ribbon light strips along the full perimeter of each inside door flange. A gap in the LED ribbon
is permitted to avoid conflict points such as the door locking mechanism.
b. Install a door-actuated switch to turn on the cabinet light, at the upper corner of the hinge side of the door.
c. Cabinet lighting shall be active when either door is opened.
d. Provide hard wire connection to the cabinet AC power, controlled by a circuit breaker.
5. Cabinet Fans
a. The cabinet ventilation shall include exhaust fans, filtration, fan assemblies, and environmental controls.
b. Each electric fan shall be equipped with a ball or roller bearing and have a minimum capacity of 100 cubic
feet per minute (cfm).
c. The fan shall be mounted on the cabinet ceiling and exhaust directly to the vent.
d. The fan shall be thermostatically controlled and shall be adjustable between 80℉ - 150℉ (27
o C – 66 o C) .
e. Provide hard wire connection to the cabinet AC power, controlled by a circuit breaker.
6. Laptop Shelf
a. Install hinged aluminum shelf and integrated storage compartment mounted on the inside of the front door.
b. Laptop shelf shall have a smooth, non-slip surface for use as a writing platform and enough size and
stability to support a typical laptop computer when extended.
c. Provide laptop shelf that has rounded or insulated edges that prevent harm the user.
d. Provide laptop shelf that folds upward for storage and locks into place.
e. Provide laptop shelf that does not require the use of any tool for locking the shelf for storage or extending
it for use.
7. The field wiring terminals may be mounted on the rear of the input file.
8. The cabinet has one shelf for the controller.
9. Equip the cabinet assemblies with a power distribution assembly to generate AC and DC power for the
electronic components, except the DC power for the controller units.
10. Auxiliary Output File Rack
a. Provide six (6) solid state flash transfer relays to enable all 18 channels to flash during backup operation.
b. Provide a total of 18 flash jumper sockets to enable a flash color for all 18 output channels.
11. Manual Jack
a. The manual jack shall be installed at the top of the EIA rail nearest the police panel.
b. The jack shall intermate with a three circuit 0.25 in. (6.35 mm) diameter phone plug.
c. The tip and ring (middle) circuits of the jack shall be connected to the logic ground and the interval
advance inputs of controller unit.
d. When the manual hand cord is plugged into the jack and the pushbutton is pressed, logic ground shall be
connected to the interval advance input of the controller unit.
e. Provide a manual ON-OFF switch on the police panel that grounds the Manual Control Enable (C1 Pin 53)
input to the controller whenever the switch is in the ON position.
f. The tip and ring (middle) circuits of the jack shall be connected to the logic ground and the interval
advance inputs of the controller unit.
g. When the manual hand cord is plugged into the jack and the pushbutton is pressed, logic ground shall be
connected to the interval advance input of the controller unit. 1821
SECTION 925 — Traffic Control Signal Equipment
h. A manual ON-OFF switch shall be provided on the police panel that grounds the Manual Control Enable (C1
Pin 53) input to the controller whenever the switch is in the ON position and advance input (C1 Pin 80).
12. Manual Pushbutton
a. Provide a manual pushbutton cord with a minimum length of 6 ft. (1.8 m).
b. Pushbutton shall have a 0.25 in. (6.35 mm) diameter, three circuit plug connected to one end and a
manual pushbutton enclosed in a handheld enclosure at the other end.
c. A complete cycle (push-release) of the manual pushbutton shall terminate the controller unit interval,
which is active except the vehicular yellow and all red clearance intervals.
d. Cycling the pushbutton during the vehicular yellow or all red clearance intervals shall not terminate the
timing of those intervals.
e. Button shall be fit within the police panel for storage.
13. Power Strip
a. Provide metal bracket mounted vertically on the rear rail.
b. Verify that the power strip can host adaptor block power supplies in a manner that the block power
supplies of cabinet accessories do not restrict use of other outlets.
c. Attach power strip to a permanent location that is easily accessible to devices in the rear of the cabinet.
d. Provide hard wire connection to the cabinet AC power, controlled by a 15A breaker.
14. Surge Protection
a. Equip each cabinet with devices to protect the control equipment from surges and over voltages.
b. Design the surge protector panels to enable adequate space for a wire connection and surge protector
replacement without the removal of terminal blocks or panels.
c. Provide surge protectors for the input sections as detailed below and as shown in the Input Terminal and
Surge Arrestor Detail.
d. Supply surge protectors that meet the following specifications.
i. AC Service Input
a. Include a surge protection unit for each cabinet on the AC service input that meets or exceeds
the following requirements:
1) Provide a hybrid type power line surge protection device on the cabinet service panel.
2) Install the protector between the applied line voltage and earth ground.
b. Use a surge protector capable of reducing the effect of lightning transient voltages applied to the
AC line that conforms to Table 9.
Table 9 – Surge Protection Device Requirements for Power Service Input
Peak surge current for an 8 x 20 ms waveform: 20,000A for 20 occurrences
Clamp voltage @ 20,000A: 280V maximum
Maximum continuous operating current: @ 120V/60 Hz 10A
Series inductance: AC Line/AC Neutral - 200 μH
Response time: Voltage never exceeds 280V during surge
Spike suppression for ±700V spike: ±40V deviation from sine wave at all phases 1822
SECTION 925 — Traffic Control Signal Equipment
c. Provide a protector that is modular and uses a 12 pin Beau connector with the following
terminals:
1) Main Line (AC line first stage terminal)
2) Main Neutral (AC neutral input terminal)
3) Equipment Line In (AC line second stage input terminal, 10A)
4) Equipment Line Out (AC line second stage output terminal, 10A)
5) Equipment neutral out (neutral terminal to protected equipment)
6) GND (Earth connection)
d. Supply a protector that is epoxy encapsulated in a flame-retardant material.
e. Configure the equipment line out to provide power to the Type 2070 controller and to the 24V
power supply.
ii. Inductance Loop Detector Inputs
a. Protect each inductance loop detector channel input by an external surge protection device that
meets or exceeds the following requirements:
1) A three-terminal device, two of which are connected across the signal inputs of the detector
with the third connected to the chassis ground to protect against common mode damage.
2) Instantly clamps differential mode surges (induced voltage across the loop detector input
terminals) via a semiconductor array. The array appears as a low capacitance to the detector.
3) Clamps common mode surges (induced voltage between the loop leads and ground) via
solid state clamping devices.
4) Withstand 25-100A surge current occurrences of a 10 x 700 ms waveform.
5) Clamp characteristics shall meet the minimum requirements in Table 10.
Table 10 – Surge Protection Clamp Requirements for Loop Detector Inputs
Maximum break over voltage: 170V
Maximum on-stage clamping voltage: 3V
Response time: <5 ns
Off-stage leakage current: <10 mA
Capacitance: less than 220 pf
b. Verify that the surge protection device meets the minimum requirements in Table 11.
Table 11 – Surge Protection Device Requirements for Loop Detector Inputs
Peak surge current: 6 times
Differential mode: 400A (8 x 20 ms)
Common mode: 1,000A (8 x 20 ms)
Estimated occurrences: 500 @ 200A
Response time: 40 ns
Input capacitance: 35 pF typical 1823
SECTION 925 — Traffic Control Signal Equipment
Table 11 – Surge Protection Device Requirements for Loop Detector Inputs
Temperature: −40°F to +185°F (−40ºC to 85ºC)
Clamp voltage @ 400A diff. mode: 30V maximum
Clamp voltage @ 1,000A comm. mode: 30V maximum
iii. Signal Load Switches (Switchpacks)
a. Provide the output of all switchpacks in all output files and output/PDAs with metal oxide
varistors (MOV) tied from the AC positive field terminal to the chassis ground to protect
switchpacks from surges on the AC output lines.
b. Provide MOVs that meet or exceed the following requirements:
1) Steady state sinusoidal voltage (RMS) rating at 50 to 60 Hz of at least 150V at 77ºF (25°C).
2) Steady state applied DC voltage rating of at least 200V at 77ºF (25°C).
3) Transient energy rating of at least 80 J for a single impulse of 10/1,000 ms current waveform
at 77ºF (25°C).
4) Peak current rating of 6,500A for a single impulse of 8/20 ms waveform with the rated
continuous voltage applied
5) Varistor voltage of at least 212V at 1.0 mA of DC current applied for the duration of 20 ms to
5 sec.
6) Clamping voltage of at least 395V with an applied 8/20 ms impulse of 100A.
7) Typical capacitance at a frequency of 0.1 to 1.0 MHz of 1,600 pF.
8) Two-terminal device, one of which is connected to the AC output of the signal load switch on
the output file terminals (backside of the field terminals) with the other connected to AC neutral
15. Low Voltage DC Inputs
a. Provide an external surge protection device for each low voltage DC input channel that meets the same
requirements as the communication inputs except for the voltage clamp, which shall be 30V line-to-line.
16. Unused Phase Monitoring
a. Provide odd-phase reds with ballast resistor (2K, 10W) dummy loads.
b. Do not wire the cabinet to monitor pedestrian yellow indications.
c. When auxiliary output file is used, provide resistors for all channels.
d. Neatly lace, label, and bundle the wiring from the signal monitor for pedestrian yellow monitoring on the
back panel.
17. Red Monitoring cable shall connect directly between the output file and monitor, without using a red
enable board.
18. Provide Model 242L DC Isolators
a. Provide Model 242L DC Isolators in accordance with CalTrans TEES 2009 with Errata 1 and 2.
b. Provide Model 242L DC Isolators with polarity jumper.
19. Provide Model 200 Switchpacks that are in accordance with CalTrans TEES 2009 with Errata 1.
20. Provide Model 204 Flasher Units that are in accordance with CalTrans TEES 2009 with Errata 1 and 2.
21. Provide Flash Transfer Relays that are in accordance with CalTrans TEES 2009 with Errata 2.
1824
SECTION 925 — Traffic Control Signal Equipment
B. Fabrication
1. The signal cabinet shall be manufactured of aluminum with a minimum thickness of 0.125 in. (3 mm).
2. The cabinet exterior shall have a smooth, uniform bare aluminum finish with all joints between adjoining
cabinet components (sides and bottom) continuously welded on the outside to prevent the intrusion of
moisture and dust.
3. The welds shall be free of cracks, blow holes, and other irregularities.
4. The shelves inside the cabinet shall be vented in order to enable air circulation throughout the cabinet.
5. Required shelves include those used for the controller input file, output file, and PDA.
6. The cabinet body shall be double flanged on all four sides to prevent the entry of dirt and liquids when the
door is open.
7. Install a gasket formed around the door opening to ensure a weather-tight seal when the door is secured.
8. Install an aluminum back panel in the cabinet, mounted on standoffs, to facilitate mounting of internal components.
9. For pole mounted installations:
a. Install exterior aluminum mounting brackets that extend a minimum of 1.75 in. (44 mm) and a maximum of
2.5 in. (63 mm) from the top and bottom of the cabinet.
b. Provide the brackets with holes for mounting to a flat surface with screws and vertical slots for banding
to poles.
C. Exceptions to CalTrans TEES 2009 and Errata 1, 2, 3 and 4.
1. Do not install the interlock circuit.
2. Meet input file wiring specifications in Tables 12, 13, and 14.
3. Meet surge suppression specifications are presented in Table 15.
4. For ramp meter applications, meet the output and auxiliary file assignments for the 334 cabinet in Tables 16
and 17.
Table 12 – Models 332 and 342 Default Input File Assignments
Upper Input File (I)
Slot 1 2 3 4 5 6 7 8 9 10 11
Type Det Det Det Det Det Det Det Det Det DC DC DC
Channel 1
C1 Pin 56 39 63 47 58 41 65 49 60 80 67 68 81
Function Ph1 Ph2 Ph2 Ph2
C Ph3 Ph4 Ph4 Ph4
C Ph1 INT
ADV
Ph2
PED
Ph6
PED
FLAS
H
Field
Term
TB-
1,2
TB-
5,6
TB-2
9,10
TB-
1,2
TB-
5,6
TB-4
9,10
TB-
1,2
TB-
5,6
TB-6
9,10 NC
TB-
4,6
TB-
7,9
NC
Channel 2
C1 Pin 56 43 76 47 58 45 78 49 62 53 69 70 82
Function Ph1 Ph2 Ph2 Ph2
C Ph3 Ph4 Ph4 Ph4
C Ph3 MCE Ph4
PED
Ph8
PED
STOP
TIME
Field
Term
TB-
3,4
TB-
7,8
TB-2
11,12
TB-
3,4
TB-
7,8
TB-4
11,12
TB-
3,4
TB-
7,8
TB-6
11,12 NC
TB-
5,6
TB-
8,9
NC 1825
SECTION 925 — Traffic Control Signal Equipment
Table 12 – Models 332 and 342 Default Input File Assignments
Lower Input File (J)
Slot 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Type Det Det Det Det Det Det Det Det Det TBA TBA DC
Channel 1
C1 Pin 55 40 64 48 57 42 66 50 59 54 71 72 51
Function Ph5 Ph6 Ph6 Ph6
C Ph7 Ph8 Ph8 Ph8
C Ph5 EVA EVB R/R
Field
Term
TB-
1,2
TB-
5,6
TB-3
9,10
TB-
1,2
TB-
5,6
TB-5
9,10
TB-
1,2
TB-
5,6
TB-7
9,10
TB-
4,6
TB-
7,9
TB- 9
10,12
Channel 2
C1 Pin 55 44 77 48 57 46 79 50 61 75 73 74 52
Function Ph5 Ph6 Ph6 Ph6
C Ph7 Ph8 Ph8 Ph8
C Ph7 EVC EVD
Field
Term
TB-
3,4
TB-
7,8
TB-3
11,12
TB-
3,4
TB-
7,8
TB-5
11,12
TB-
3,4
TB-
7,8
TB-7
11,12
TB-
5,6
TB-
8,9
TB- 9
11,12
Table 13 – Model 336S Default Input File Assignments
Slot 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Type Det Det Det Det Det Det Det Det DC TBA TBA DC DC DC
Channel 1
C1
Pin 56 39 58 41 55 40 57 42 51 71 72 67 68 81
Funct Ph1 Ph2 Ph3 Ph4 Ph5 Ph6 Ph7 Ph8 SE1 EVA EVB Ph2
PED
Ph6
PED FLASH
Field
Term
TB-
1,2
TB-
5,6
TB-7
9,10
TB-8
1,2
TB-8
5,6
TB-8
9,10
TB-9
1,2
TB-9
5,6
TB- 5
1,2
TB- 5
5,6
TB- 5
9,10
TB-
1,2
TB-
5,6
NC
Channel 2
C1
Pin 47 43 49 45 48 44 50 46 52 73 74 69 70 82
Funct Ph2
Call Ph2 Ph4
Call Ph4 Ph6
Call Ph6 Ph8
Call Ph8 R/R EVC EVD Ph4
PED
Ph8
PED
STOP
TIME
Field
Term
TB-
3,4
TB-
7,8
TB-7
11,12
TB-8
3,4
TB-8
7,8
TB-8
11,12
TB-9
3,4
TB-9
7,8
TB-5
3,4
TB-5
7,8
TB-5
11,12
TB-
3,4
TB-
7,8
NC 1826
SECTION 925 — Traffic Control Signal Equipment
Table 14 – Model 334 Default Input File Assignments
Slot 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Type Det Det Det Det Det Det Det Det Det Det Det TBA TBA TBA
Channel 1
C1
Pin 46 50 49 55 51 57 59 61 81 79 53 41 43 45
Func
tion
L1
D1
L2
D2
L1
Q1
L3
Q3
L1
MLA
L2
MLA
L3
MLA
L4
MLA
L3
D3
Field
Term
TB-
1,2
TB-2
5,6
TB-2
9,10
TB-3
1,2
TB-3
5,6
TB-3
9,10
TB-4
1,2
TB-4
5,6
TB-4
9,10
TB-5
1,2
TB-5
5,6
TB-5
9,10
TB-6
1,2
TB-6
5,6
Channel 2
C1
Pin 39 47 48 56 52 58 60 62 80 82 54 40 42 44
Func
tion
L1
P1
L2
P2
L2
Q2
L1
MLB
L2
MLB
L3
MLB
L4
MLB
L3
P3
Field
Term
TB-
3,4
TB-2
7,8
TB-2
11,12
TB-3
3,4
TB-3
7,8
TB-3
11,12
TB-4
3,4
TB-4
7,8
TB-4
11,12
TB-5
3,4
TB-5
7,8
TB-5
11,12
TB-6
3,4
TB-6
7,8
Table 15 – Required Surge Arrestors for Cabinet Terminal Blocks
Model 332 Cabinet Field Terminal Blocks Terminals
TB-8 1-12
TB-9 10-12
TB-9 4-9
TB-2, TB-3, TB-4, TB-5, TB-6, TB-7 1-12
Model 336S Cabinet Field Terminal Block Terminals
TB-4 1-12
TB-5 1-4
TB-5 5-12
TB-7, TB-8, TB-9 1-12
Model 334 Cabinet Field Terminal Block Terminals
TB-2, TB-3, TB-4 1-12
TB-5 1-4
Note: Refer to Section 925.2.06.A.14 for the required arrestor for each of the terminal blocks listed above. 1827
SECTION 925 — Traffic Control Signal Equipment
Table 16 – Model 334 PDA Type 3 Ramp Meter Output File
Switchpack 1 Switchpack 2 Switchpack 3
C1 Pin
Out #
Connector
Function
Field
Terminal
C1 Pin
Out #
Connector
Function
Field
Terminal
C1 Pin
Out #
Connector
Function
Field
Terminal
RED
2 0 C6-1 Warn 1 T4-7 4 2 C6-3 Lane
1 Red
T4-4 7 5 C6-6 Lane
2 Red
T4-1
YELLOW
37 34 C6-9 Not
used
T4-8 5 3 C6-4 Lane
1 Yel
T4-5 8 6 C6-7 Lane
2 Yel
T4-2
GREEN
3 1 C6-2 Warn 2 T4-9 6 4 C6-5 Lane
1 Grn
T4-6 9 7 C6-8 Lane
2 Grn
T4-3
Table 17 – Model 334 Ramp Meter Auxiliary Output File
Switchpack 9 Switchpack 10 Switchpack 11
C1 Pin
Out #
Connector
Function
Field Terminal
C1 Pin
Out #
Connector
Function
Field Terminal
C1 Pin
Out #
Connector
Function
Field Terminal
RED
97 53 C5-
Lane
3 R
A1-
94 50 C5-
Not
used A121 91 48 C5-
Not
used A114
YELLOW
98 54 C5-
Lane
3 Y
A1-
95 51 C5-
Not
used A122 101 37 C5-
Not
used A115
GREEN
99 55 C5-
Lane
3 G
A1-
96 52 C5-
Not
used A123 93 49 C5-
Not
used A116
All other switchpacks unused 1828
SECTION 925 — Traffic Control Signal Equipment
D. Cabinet Model 337
1. Supply the cabinet assembly with capacity for 11 two-channel slots in the input file.
2. The cabinet has two full-size doors to enable complete access from the front or back of the cabinet.
3. Design the rack assembly to mount in CalTrans standard rails to enable a Model 204 flasher.
4. Provide a receptacle to accept the plug-in power distribution assembly card guides and edge connectors for
the input file card guides to support the conflict monitor, and load switches and flash transfer relays.
E. Cabinet Model 334 with Auxiliary Output File for Ramp Metering Operations
1. The controller cabinet shall comply with the CalTrans TCSES (1989), Model 334 Cabinet specifications
(Chapter 6) and the specification Clarifications dated December 20, 1993.
2. Do not use the February 1993 Amendments for specifications for the Model 334C Cabinet.
F. ATC Cabinet Model 332 and 342
1. The controller cabinet shall comply, without modification, based upon the referenced ATC:5301 v.02 specification.
2. Supply controller cabinet assembly in specified Model 332 or 342 cabinet shell as defined in the Contract.
925.2.07 Uninterruptible Power Supply Requirements
A. General
1. Provide UPS for outdoor applications in accordance with the CalTrans TEES 2009 Chapter 4, July 7, 2009.
2. Provide UPS that is compatible with CalTrans L Series and ATC Cabinets, Model 2070LX Controllers, and all
other cabinet components for full-time operation.
3. Provide UPS inverter that is line interactive.
4. UPS Mounting Configurations
a. See Contract for project-specific information about the UPS and select one of the following
configuration options.
b. Configuration options include:
i. Configuration 1: The UPS (Inverter/Charger, Bypass Switch, and Transfer Relay only) installed inside
the cabinet, with the batteries installed in the externally mounted cabinet.
ii. Configuration 2: The entire UPS, including batteries, installed inside the externally mounted cabinet.
iii. Configuration 3: The entire UPS, including batteries, installed inside the traffic control device cabinet.
B. Functional Requirements
1. Provide battery capacity (A-hr) to provide a minimum 4 hours of run-time at an assumed 500 W load full
operation of an intersection.
2. Provide minimum 1000 W at 25°C (77°F), with 80% minimum inverter efficiency.
3. Provide an inverter/charger, power transfer relay, batteries, a separate, manually operated non-electric bypass
switch, hardware, and interconnected wiring.
4. The transfer time from disruption of normal utility line voltage to stabilized inverter line voltage from batteries,
shall be a maximum of 5 ms. The same maximum transfer time shall also apply when switching from inverter
line voltage to utility line voltage.
5. Recharge time for the battery, from protective low-cutoff to 80% or more of full battery charge capacity, shall
not exceed 20 hours.
6. Provide LCD display for monitoring unit.
1829
SECTION 925 — Traffic Control Signal Equipment
7. Provide four dry contact closures.
8. Provide automatic low-battery and high temperature shutdown features.
9. Provide capability to return to normal operations without a manual reset.
10. Provide UPS with a maximum audible noise of <50 dBA at 3 ft. (0.9 m).
C. Environmental
1. The UPS shall use a temperature-compensated battery charging system.
2. The charging system shall compensate over a range of 2.5 to 4.0 mV/°C (5 to 8 mV/°F) per cell.
3. Batteries shall not be recharged when battery temperature exceeds 50°C (122°F) ±3°C (6°F).
4. Temperature sensor
a. Provide temperature sensor that is located external to the inverter/charger unit.
b. Provide temperature sensor with 10 ft. (3 m) of wire.
c. Provide temperature sensor that connected to the battery a with ring terminal to prevent loss of connectivity.
D. Electrical
1. For achieving a bypass of the UPS:
a. The power transfer relay shall be rated at minimum 120 VAC/30A, or
b. The bypass switch shall be rated at a minimum 120VAC/10A for triggering the transfer relay.
2. When utilizing battery power, the UPS output voltage shall be between 110 VAC and 125 VAC, pure sine wave
output, ≤3% THD, 60 Hz ±3 Hz.
3. UPS shall bypass the utility line power whenever the utility line voltage is outside of the following voltage
range: 100 VAC to 130 VAC (± 2 VAC).
4. In cases of low (below 98 VAC) or absent utility line power, when the utility line power has been restored at
above 105 VAC ±2 VAC for more than 30 sec, the UPS shall transfer from battery backed inverter mode back
to utility line mode.
5. In cases of high utility line power (above 132 VAC), when the utility line power has been restored at below
125 VAC ±2 VAC for more than 30 sec, the UPS shall transfer from battery backed inverter mode back to
utility line mode.
6. Provide capability to prevent a malfunction feedback to the cabinet or from feeding back to the utility service.
7. In the event of inverter/charger failure, battery failure or complete battery discharge, the power transfer relay
shall revert to the NC (and de-energized) state, where utility line power is connected to the cabinet.
E. User Interface
1. Provide the user with three sets of normally open (NO) and normally closed (NC) single-pole double-throw
(SPDT) dry relay contact closures, available on a panel-mounted terminal block, rated at a minimum of
120V/1A, and labeled or marked On Batt.
2. The first set of NO and NC contact closures shall be energized whenever the unit switches to battery power.
Contact shall be labeled or marked On Batt.
3. The second set of NO and NC contact closures shall be energized whenever the battery approaches
approximately 40% of remaining useful capacity. Contact shall be labeled or marked Low Batt.
4. The third set of NO and NC contact closures shall be energized two hours after the unit switches to battery
power. Contact shall be labeled or marked Timer.
5. Relay contact activation shall be annunciated on the front panel via a visual indication. This can be either
discrete LED, or part of LCD screen, etc. 1830
SECTION 925 — Traffic Control Signal Equipment
F. Network Addressable Capability Requirements
1. Provide Domain Name System (DNS) capability.
2. Support both fixed IP addresses and dynamically assigned IP addresses provided by a DHCP server.
3. Support static management interface IP addressing.
4. The IP-addressable and communication addresses shall be user-programmable.
5. The system processor shall enable a remote user with a standard web browser to gain remote access, collect
data, and control and configure the UPS.
G. Remote Monitoring Requirements
1. Provide UPS that supports local and remote monitoring and control via Ethernet port interface.
2. Provide remote environmental sensing hardware and software integrated with SNMP minimally capable of
temperature and including generating alarms for low battery, over/under voltage, over/under frequency, and
high temperature.
3. Provide an addressable SNMP command set including, at a minimum:
i. UPS state.
ii. Battery condition (voltage, sampling temperature of one battery).
iii. Current AC input conditions (voltage, frequency).
iv. Current AC output conditions (voltage, AC amps, frequency).
v. Diagnostic/self-test control and status.
H. Battery System
1. Provide maintenance-free sealed batteries that can be serviced and replaced separately from the UPS.
2. Provide batteries that are rated for extreme temperatures that have been field proven and tested.
3. Provide UPS batteries that maintain 70% of original capacity for a minimum of five years.
4. Provide battery charger with a minimum of three-stage, temperature compensated charging and keeps the
batteries above a minimum depth of discharge point of 50% or as recommended by the manufacturer.
5. Provide user-replaceable and hot-swappable battery packs.
6. Provide batteries with non-conductive terminal covers.
I. Cabinet Requirements
1. Provide battery bank(s) that mount on an EIA 19 in. (483 mm) rack using a maximum space of five rack units.
2. Provide inverter/charger unit that can be shelf-mounted or rack-mounted on a standard EIA 19 in rack.
a. If the inverter/charger is mounted inside the Model 332 Cabinet (Configuration 1), provide a shelf that
supports the weight of the unit.
b. Power transfer relay and manual bypass switch shall be mounted on EIA rail.
c. Interconnect wiring shall be provided between power transfer relay, bypass switch, and cabinet terminal
service block. 1831
SECTION 925 — Traffic Control Signal Equipment
3. Interconnect cable requirements
a. UL Style 1015 CSA TEW
b. Minimum 10 ft. (3 m) length
c. Minimum No. 6 AWG, and 133 strands of No. 30 AWG tinned copper
d. Minimum rating: 600V, 221°F (105°C), PVC insulation
4. Relay contact cable provided for each set of NO/NC relay contact closure terminals requirements
a. UL Style 1015 CSA TEW
b. Minimum of 10 ft. (3 m)
c. Minimum No. 18 AWG wire, and 16 strands of No. 30 AWG tinned copper
d. Minimum rating: 600V, 221°F (105°C), PVC insulation
5. Wiring
a. Trim wiring as necessary for installation.
b. Wire UPS power transfer relay and manual bypass switch as shown in Figure 1 to provide
interconnectivity with cabinets for interchangeability between UPS manufacturers.
FIGURE 1 – UPS UTILITY POWER CONNECTION DIAGRAM 1832
SECTION 925 — Traffic Control Signal Equipment
6. External Cabinet
a. General
i. Provide external cabinet that is NEMA 3R rated cabinet conforming to the CalTrans TEES 2009.
ii. The external cabinet shall be used for housing batteries or UPS, which includes inverter/charger unit,
power transfer relay, manually operated bypass switch, other control panels, and wiring harnesses.
iii. The same inverter/charger, power transfer relay, and manually operated bypass switch that fits inside
a 2070 L series cabinet or ATC cabinet shall also fit inside the externally mounted cabinet.
iv. The external cabinet finish shall be bare aluminum.
b. Shelf
i. Provide four shelves.
ii. Provide a minimum of 12 in. (305 mm) clearance between shelves.
iii. Provide shelf size of a minimum of 10.38 in. (264 mm) X 25 in. (635 mm).
iv. Provide shelves that can support a minimum of 125 lb. (57 kg) each.
v. Provide shelves with edges turned down on all four sides for support and to provide a flat top surface.
vi. Provide shelves with predrilled holes for EIA rail mounting.
vii. Provide a vertical passageway for wiring in the rear of the cabinet on both the left and right of
the shelves.
viii. Provide capability of removing the bottom shelf.
c. Rack mounting
i. Two EIA angle rails and all necessary mounting hardware (four sets of 10-32 bolts and nuts with
captive washers) shall be provided with the external cabinet (not installed).
ii. Rails shall be symmetric to enable installation on either right or left sides of the cabinet.
iii. Mounting holes and bracket shall enable EIA rail installation at any location in the external cabinet.
iv. The EIA mounting angle nominal thickness shall be either 0.1345 in. (3.4 mm) plated steel or 0.105 in.
(2.6 mm) stainless steel.
v. EIA rail mounting bracket shall be of continuous, one-piece design bolted into the cabinet to provide
support for rail-mounted equipment.
vi. Pressed in, flush-head threaded screw posts shall be inserted into the front face of the cabinet
enclosure top sill.
vii. The threaded posts shall be used to mount both the fan panel and the EIA rail-mounting bracket.
viii. The screw posts shall be #10-32 thread size stud 0.625 in. (16 mm) length.
d. Ventilation
i. The external UPS cabinet shall be ventilated using louvered vents, filter, and a minimum of one
thermostatically controlled fan per CalTrans TEES 2009.
ii. The thermostat shall be accessible without removing the UPS controller.
iii. Provide a two-position terminal block on the fan panel, along with 10 ft. (3 m) of connected hookup wire.
e. Cabinet Door
i. The door shall be attached to the cabinet per the CalTrans TEES 2009.
ii. The door shall use a padlock clasp or latch and lock mechanisms as described in the CalTrans TEES
2009, in order to lock the door. 1833
SECTION 925 — Traffic Control Signal Equipment
7. Maintenance, Displays, Controls, and Diagnostics
a. Provide display or meter to indicate current battery charge status and conditions.
b. Provide remote monitoring of current battery charge status and conditions.
c. Provide voltmeter standard probe input-jacks (+) and (−) to read the exact battery voltage drop at the
inverter input.
d. Provide a 0 to 100% battery capacity LED indicator.
e. Provide lightning surge protection compliant with IEEE/ANSI C.62.41.
f. Provide an integral system to prevent battery from destructive discharge and overcharge.
g. Provide batteries shall be easily replaced with all needed hardware and shall not require special tools
for installation.
h. Provide a front-panel event counter display to indicate the number of times the UPS was activated and a
front-panel hour meter to display the total number of hours the unit has operated on battery power.
i. Provide meters with the capability of a reset option.
j. Manufacturer shall include a set of equipment lists, operation and maintenance manuals, and board-level
schematic and wiring diagrams of the UPS, and the battery data sheets.
k. Manual switch shall conform to the CalTrans TEES 2009.
J. Acceptance
1. The manufacturer, or an independent testing lab hired by the manufacturer, shall perform design qualification
testing on the new UPS system and when a major design change has been implemented on an existing design.
2. Each UPS shall be given a minimum of five (5), 4-hour full battery cycle tests during the Operational Test
period defined in Section 647 .
3. Each system shall be visually inspected for exterior physical damage or assembly anomalies. Defects will be
cause for rejection.
925.2.08 Solar Power System Requirements
A. General
1. Solar power systems may be used for flashing beacon type applications including:
a. RRFB
b. School Speed Zone Flasher
c. Beacon on MUTCD warning or regulatory sign.
2. Provide solar power system that can be mounted in a permanent configuration or in a temporary portable type
configuration.
3. Provide DC-to-DC and DC-to-AC conversion equipment, as specified herein.
B. Equipment
1. The solar power system shall be comprised of:
a. Solar Panel
b. Battery
c. Charge Controller
d. Power Inverter
2. Refer to Section 939 for the solar power system specifications. 1834
SECTION 925 — Traffic Control Signal Equipment
925.2.09 Prefabricated Controller Cabinet Base Requirements
A. General
1. Provide controller cabinet bases that are precast polymer concrete and grey in color.
2. Provide controller cabinet bases with dimensions as shown in the Standard Details.
3. The prefabricated controller cabinet base shall meet ASTM D 543 Section 7, Procedure 1.
4. Provide a copy of test reports from a certified laboratory along with the materials certification package.
B. Equipment
1. Provide prefabricated controller cabinet base with correct bolt pattern for the cabinet to be installed.
2. Provide prefabricated controller cabinet bases with UNC inserts as shown in the Contract.
3. UNC inserts shall be stainless steel and designed for a minimum of 15 ft.-lb. (20 N-m) of torque.
4. The prefabricated controller cabinet bases shall withstand wind loading of 125 mph. (200 kph.) with the
cabinets mounted as shown in the Contract.
5. The prefabricated controller cabinet bases shall withstand a minimum static vertical load of 5,000 lb.
(2,262 kg) over a 10 in. (254 mm) by 10 in. (254 mm) by 1 in. (25 mm) thick distribution plate and withstand a
tested load of 7,500 lb. (3,394 kg).
6. The prefabricated controller cabinet bases shall withstand a minimum lateral load of 1,800 lb. (814 kg) over an
18 in. (457 mm) by 24 in. (610 mm) by 1 in. (25 mm) steel plate applied to the longest side and withstand a
tested load of 2,700 lb. (1,222 kg).
7. The prefabricated controller cabinet base shall withstand a 50 ft.-lb. (67.8 Nm) impact administered with a
12-lb. (5.4 kg) weight having a C tup without puncture or splitting, in accordance with ASTM D 2444.
925.2.10 Rectangular Rapid Flashing Beacon Assembly Requirements
A. General
1. Provide Rectangular Rapid Flashing Beacon Assemblies in the quantities and locations indicated in the contract.
2. Provide all equipment, materials, and work in accordance with manufacturers’ recommendations, including
mounting, wiring and cabling, power supply, surge suppression, and communications equipment and materials.
3. All provisions of the MUTCD applicable to warning beacons shall be met, except as otherwise provided in
this section.
4. RRFB assembly shall consist of the following components: beacons, mounting pole and foundation, wireless
subsystem, and solar power subsystem.
B. Equipment
1. Provide a RRFB assembly that meets the criteria FHWA Interim Approval for Optional Use of Pedestrian-
Actuated Rectangular Rapid-Flashing Beacons at Uncontrolled Marked Crosswalks (IA-21), March 20, 2018.
2. The Rectangular Rapid Flashing Beacon Assembly consists of the following components and materials:
a. Rectangular Rapid Flashing Beacon
b. Solar cell with battery or utility power service
c. Signs
d. Wireless subsystem
e. Pushbutton activation system
f. Mounting hardware
1835
SECTION 925 — Traffic Control Signal Equipment
g. Configuration and data collection software
h. Installation and testing
3. Rectangular Rapid Flashing Beacon Assembly shall meet the performance requirements listed below:
a. Beacon Dimensions and Placement in Sign Assembly
i. Indications
a. Face LED indications towards oncoming traffic.
b. Locate indications between the bottom of the crosswalk warning (S1-1) sign and the top of the
supplemental downward diagonal arrow (W16-7p) sign.
b. Beacon Operation
i. Uses pedestrian pushbuttons per Section 937.2 to actuate the Rectangular Rapid Flashing Beacons. ii. Powered by:
a. Solar cells and batteries with automatic battery charging and power control.
b. Utility power may be used in areas where significant tree or building canopies prevent adequate
solar charging.
iii. Uses wireless communication to avoid trenching.
iv. Provide a minimum visual distance of 1,000 ft. (305 m) during daytime and nighttime.
c. Wireless Subsystem
i. Frequency in the 900 MHz FHSS or 2.4 GHz range.
ii. Range: minimum 500 ft. (152 m).
d. Solar Panel Subsystem and Batteries
i. Provide solar panel output with a minimum 20 W panel or as required by the manufacturer.
ii. Provide batteries that are sealed and maintenance free with a minimum lifespan of 3 years.
iii. Provide batteries that are 12V, 20-40 A-Hr sealed gel, or approved equivalent.
iv. Provide cabinet (if required) that is pole mounted, NEMA 4x rated fiberglass cabinet with locking
clasps or powder coated aluminum with tamper-proof hinged door or approved equivalent.
v. Provide solar panel mount for pole mount that includes a 60-degree angle bracket or per
manufacturer recommended specifications.
4. Mounting Pole and Foundation
a. Provide a breakaway mounting pole and foundation designed to support the Rectangular Rapid Flashing
Beacon and the associated solar panel, batteries, and equipment required to supply a complete
Rectangular Rapid Flashing Beacon.
b. Determine pole foundation dimensions based on the local conditions at the locations indicated in
the contract.
c. Verify the pole foundation provides a safe and secure mounting of the solar-powered Rectangular Rapid
Flashing Beacon Assembly.
925.2.11 Flashing Beacon Assembly Requirements
A. General
This specification is for a flashing beacon cabinet that consists of an aluminum cabinet containing a flasher assembly,
field connection terminal block, surge arrestor, and circuit breaker wired in a manner to operate flashing beacons. 1836
SECTION 925 — Traffic Control Signal Equipment
B. Equipment
1. Flasher Unit
a. Supply a standard plug-in two circuit NEMA solid state flasher.
b. Provide solid state flasher rated for a minimum of 10 A per circuit.
c. The flasher shall utilize a zero-voltage turn-on, turn-off current, and capable of diming outputs.
2. Surge Arrestor
a. Supply a flasher cabinet that incorporates an AC surge arrestor to protect the internal components from
lighting and over voltages on the AC service input.
b. The requirements for the surge arrestor are listed in Table 18.
Table 18 – Surge Arrestor Requirements for Flashing Beacon Cabinet
Peak Surge Current 20,000A
Peak Surge Voltage @ 20 kA 280V
Clamp Voltage 280V @ 20 kA
Continuous AC Voltage 120VAC RMS
Response Time <5 ns
Operating Temperature −40ºF to 185ºF (−40ºC to 85ºC)
3. Circuit Breaker
a. Provide circuit breakers in the cabinet.
b. The circuit breaker shall have the following characteristics.
i. Thermal Magnetic 1 pole 120/240 VAC at 50/60 Hz 15A
ii. Interrupting rating of 10 kA at 48 VDC
iii. Wire Size No. 14 to No. 2 AWG
iv. 35 mm. DIN Rail mounting
4. Terminal Block
a. Include a four-position terminal block in the cabinet for making field connections.
b. Label all field terminal connections.
5. Construction
a. Assemble the flasher assembly, terminal block, surge arrestor, and circuit breaker in the cabinet.
b. Wire all components together as a working unit, thus requiring only field connections to and from the AC
power and flashing beacons.
925.2.12 Flashing Signal Cabinet for School Speed Zones
A. General
1. This specification is for a flashing signal cabinet consisting of an aluminum cabinet containing:
a. Flasher assembly.
b. Activation device (Time clock, GPS clock or wireless device).
1837
SECTION 925 — Traffic Control Signal Equipment
c. Field connection terminal block.
d. Surge arrestor.
e. Circuit breaker.
B. Equipment
1. Supply activation devices that are single circuit, calendar programmable, solid state, fully self-contained units
that meet the following specifications:
a. Alphanumeric liquid crystal display.
b. Automatic daylight savings time and leap year compensation.
c. Changes in the daylight savings time program made through device keypad or remote connectivity.
d. Minimum 24-hour capacitive backup. Battery backup is not acceptable.
e. Operate on 95 to 135 VAC, 60 Hz line current or solar assembly as defined in this Section.
f. SPDT relay output rated at 15A.
g. Maximum size of 4.75 in. (121 mm) wide, 10.375 in. (264 mm) high, and 2 in. (51 mm) deep.
h. Ability to do program transfer from unit to unit.
i. Ability to schedule a minimum of six unique daily and 25 unique annual exception events.
2. Include a programming manual with each unit.
3. Include program transfer cable with unit.
925.2.13 Wire and Cable
A. General
All cable and wire from the traffic signal cabinet to all vehicular and pedestrian signal faces, pedestrian
pushbuttons, and inductance loops shall meet IMSA specifications.
B. Equipment
1. All wire used for signal conductors shall be stranded copper.
2. Table 19 provides requirements for wire specification for traffic signal and ramp meter input and
output applications.
Table 19 – Signal Cables and Applications
IMSA Cable Specification Application
19-1 (Various Number of Stranded Conductors) Traffic Signal Conductors for Vehicular and Pedestrian
Signal Faces
51-1, 51-3, and 51-7 (single wire) In-Pavement Loop Detector Wire
50-2 (3-Twisted Pairs, Shielded) Signal Loop Detector Lead-in Wire and Pedestrian
Pushbuttons
3. All traffic control device grounding conductors and grounding electrodes shall conform to Section 682 . 1838
SECTION 925 — Traffic Control Signal Equipment
925.2.14 Signal Module Requirements
A. General
This specification covers Type 1 LED red, green, and yellow modules for vehicle signal faces for both circular and
arrow indications.
B. Equipment
1. General
a. Supply LED Signal Modules that fit in standard incandescent vehicle traffic signal housings and meet the
performance specification of ITE Vehicle Traffic Control Signal Heads.
b. Verify that Type 1 LED signal modules include a LED circuit board with LEDs and required circuit
components, 36 in. (900 mm) No. 16 AWG wire leads with strain relief and spade terminals, a rigid
housing, and a one-piece neoprene gasket.
c. Supply Type 1 LED signal modules that are weathertight when mounted in the traffic signal housing.
d. Submit life data on the LEDs from the LED signal module manufacturer to calculate the expected useful life.
e. Supply modules with permanent markings of date of manufacture and date of installation.
f. Verify that the Type 1 LED signal modules utilize the same mounting hardware that is used to secure the
incandescent lens and gasket assembly.
2. Optical
a. Provide test data from an independent laboratory to verify that the performance of the product meets
current ITE requirements.
b. Verify that the individual LEDs are wired such that a catastrophic failure of one LED will result in the loss
of not more than 5% of the signal module light output.
c. The failure of a single LED in a string or cluster of LED’s causes loss of light from only that LED, not the
entire string or indication.
d. Provide control circuitry that prevents the current flow through the LEDs in the off state to avoid false
indications as may be perceived by the human eye during daytime and nighttime hours.
e. Verify that the LED signal module is operationally compatible with existing or new conflict monitors (Model
208, Model 2018, and ITS Cabinet CMU and AMU)
f. Verify that the LED signal module is operationally compatible with existing or new load switches.
3. Electrical
a. Verify that the power factor is 90% or greater, at nominal rated voltage, at 77ºF (25°C), after 60 minutes
of operation.
b. Provide modules that do not exceed the maximum power consumption as shown in Table 20.
Table 20 – Signal Display Module Maximum Power Consumption
Vehicle Indications Red Yellow Green
Temperature 77° F
(25°C)
165° F
(74°C)
77° F
(25°C)
165° F
(74°C)
77° F
(25°C)
165° F
(74°C)
12 in. (300 mm) Circular 11 W 17 W 22 W 25 W 15 W 15 W
8 in. (200 mm) Circular 8 W 13 W 13 W 16 W 12 W 12 W
12 in. (300 mm) Arrow 9 W 12 W 10 W 12 W 11 W 11 W 1839
SECTION 925 — Traffic Control Signal Equipment
Pedestrian Indications Upraised Hand
(Portland Orange) Walking Person (White)
Temperature 77° F
(25°C)
165° F
(74°C)
77° F
(25°C)
165° F
(74°C)
12 in. (300 mm) 10 W 12 W 9 W 12 W
c. Verify that the total harmonic distortion (THD) is less than 20%, at rated voltage, at 77ºF (25°C).
d. Provide LED traffic signal modules that meet FCC noise regulations.
e. Verify that the LED signal modules operate on line voltage, 120 VAC nominal, and can operate over the
voltage range of 80 VAC to 135 VAC.
f. Power supply must be integral to the module.
g. Provide transient voltage suppression rated at 1,500 W for 1 ms and fusing with a maximum rating of 2A
to minimize the effect and repair cost of an extreme over-voltage situation or other failure mode.
4. Lens
a. Provide lens of the modules that are polymeric and are not frosted and have a surface coating to provide
front surface abrasion resistance.
b. Supply lenses that are made of UV stabilized polycarbonate.
c. Provide smooth external lens surface with no raised features, to minimize the collection of dirt, diesel
smoke, and other particulate contaminants, and to facilitate periodic cleaning.
d. Provide red and yellow LED modules with tinted lenses are tinted that correspond with the wavelength
(chromaticity) of the LED.
e. Provide green modules with clear (transparent) lenses.
5. Light Output
a. Provide ability to reduce light output in response to an input from the traffic signal controller.
b. Verify the minimum light output when dimmed is not less than 30% of the minimum maintained luminous
intensity as defined in the applicable traffic signal face module.
6. Circular Signal Modules
a. Before delivery of modules, supply certification that module follows these specifications.
b. Supply substantiating documentation from an independent test laboratory to show the product has
passed design qualification testing in accordance with Section 6.4 of the ITE Vehicle Traffic Control Signal
Heads: LED Circular Signal Supplement.
c. Verify the report includes a Minimum Maintained Luminous Intensity chart for the module uses the same
horizontal and vertical angles as shown in Table 1 of the ITE Vehicle Traffic Control Signal Indications:
LED Circular Signal Supplement.
d. Provide modules with a signed copy of the production, test, and inspection as detailed in Section 6.3 of
the ITE Vehicle Traffic Control Signal Indications: LED Circular Signal Supplement.
e. Verify that Circular Signal Modules have prominent and permanent markings to designate the orientation
of the signal module in the traffic signal housing. The marking should be an up arrow or the word UP or
TOP.
f. Verify Circular Signal Module meets the photometric requirements as indicated and described in the ITE
Vehicle Traffic Control Signal Indications: LED Circular Signal Supplement. 1840
SECTION 925 — Traffic Control Signal Equipment
g. Supply red and yellow LEDs that utilize AllnGap technology, either AS (Absorbing Substrate) or TS
(Transparent Substrate) and do not exhibit degradation of more than 30% of their initial light intensity
following accelerated life testing (operating at 185°F [85°C] and 85% humidity, for 1,000 hours). AlGaAs
technology is not acceptable.
h. Supply green LEDs that utilize gallium nitride technology.
7. Vehicle Arrow Signal Modules
a. Provide Arrow Signal Modules that are omni-directional and marked as omni-directional so that they may
be rotated at any angle.
b. Before delivery of modules, supply certification that module follows these specifications.
c. Supply substantiating documentation from an independent test laboratory to show the product has
passed design qualification testing in accordance with Section 6.4 of the ITE Vehicle Traffic Control Signal
Indications: LED Circular Signal Modules Supplement.
d. Verify the report includes a Minimum Maintained Luminous Intensity chart for the module if uses the same
horizontal and vertical angles as shown in Table 1 of the ITE Vehicle Traffic Control Signal Indications:
LED Vehicle Arrow Traffic Signal Modules Supplement.
e. Provide modules with a signed copy of the production and test and inspection as detailed in Section 6.3
of the ITE Vehicle Traffic Control Signal Indications: LED Vehicle Arrow Traffic Signal Supplement.
f. Supply red and yellow LEDs that utilize AllnGap technology, either AS (Absorbing Substrate) or TS
(Transparent Substrate) and do not exhibit degradation of more than 30% of their initial light intensity
following accelerated life testing (operating at 185°F (85°C) and 85% humidity, for 1,000 hours). AlGaAs
technology is not acceptable.
g. Supply green LEDs that utilize gallium nitride technology.
h. Bi-modal traffic signal faces shall meet the standards for both yellow and green LED arrows.
i. Supply LED Arrow Signal Modules that fit in standard incandescent vehicle traffic signal housings and
meet the ITE Vehicle Traffic Control Traffic Signal Faces Part 3: LED Vehicle Traffic Signal Modules.
j. Verify the LED arrow modules meet the required luminous intensity as shown in Table 21.
Table 21 – Minimum Maintained Luminous Intensity Values for Arrow LED Indications
Angle
12 in. (300 mm)
Angle
12 in. (300 mm)
Vert Horiz Vert Horiz
+ ± Red Yellow Green - ± Red Yellow Green
2.5
2.5 56.8 141.6 73.9
2.5
2.5 56.8 141.6 73.9
7.5 47 117.1 61.1 7.5 47 117.1 61.1
12.5 32.1 80.1 41.8 12.5 32.1 80.1 41.8
17.5 18.2 45.3 23.7 17.5 18.2 45.3 23.7
22.5 8.5 21.2 11.1 22.5 8.5 21.2 11.1
27.5 3.3 8.2 4.3 27.5 3.3 8.2 4.3
7.5
2.5 47 117.1 61.1
7.5
2.5 47 117.1 61.1
7.5 38.9 97 50.6 7.5 38.9 97 50.6 1841
SECTION 925 — Traffic Control Signal Equipment
Table 21 – Minimum Maintained Luminous Intensity Values for Arrow LED Indications
Angle
12 in. (300 mm)
Angle
12 in. (300 mm)
Vert Horiz Vert Horiz
+ ± Red Yellow Green - ± Red Yellow Green
12.5 26.7 66.5 34.7 12.5 26.7 66.5 34.7
17.5 15.1 37.7 19.7 17.5 15.1 37.7 19.7
22.5 7.1 17.7 9.2 22.5 7.1 17.7 9.2
27.5 2.8 6.9 3.6 27.5 2.8 6.9 3.6
12.5
2.5 32.1 80.1 41.8
12.5
2.5 32.1 80.1 41.8
7.5 26.7 66.5 34.7 7.5 26.7 66.5 34.7
12.5 18.3 45.7 23.9 12.5 18.3 45.7 23.9
17.5 10.5 26.1 13.6 17.5 10.5 26.1 13.6
22.5 5.0 12.4 6.4 22.5 5.0 12.4 6.4
27.5 - - - 27.5 - - -
17.5
2.5 18.2 45.3 23.7
17.5
2.5 18.2 45.3 23.7
7.5 15.1 37.7 19.7 7.5 15.1 37.7 19.7
12.5 10.5 26.1 13.6 12.5 10.5 26.1 13.6
17.5 6.0 15.0 7.8 17.5 6.0 15.0 7.8
22.5 2.9 7.2 3.8 22.5 2.9 7.2 3.8
27.5 - - - 27.5 - - -
22.5
2.5 8.5 21.2 11.1
22.5
2.5 8.5 21.2 11.1
7.5 7.1 17.7 9.2 7.5 7.1 17.7 9.2
12.5 5.0 12.4 6.4 12.5 5.0 12.4 6.4
17.5 2.9 7.2 2.8 17.5 2.9 7.2 2.8
22.5 - - - 22.5 - - -
27.5 - - - 27.5 - - -
27.5
2.5 3.3 8.2 4.3
27.5
2.5 3.3 8.2 4.3
7.5 2.8 6.9 3.6 7.5 2.8 6.9 3.6
12.5 - - - 12.5 - - -
17.5 - - - 17.5 - - -
22.5 - - - 22.5 - - -
27.5 - - - 27.5 - - - 1842
SECTION 925 — Traffic Control Signal Equipment
925.2.15 LED Pedestrian and Countdown Signal Module Requirements
A. General
1. Provide LED traffic signal modules designed as a retrofit replacement for the message bearing surface of
nominal 16 in. x 18 in. (400 mm x 450 mm) traffic signal housing built to the PTSCI Standard.
2. The message bearing surface of the module consists of an overlapping UPRAISED HAND and Walking Person
symbols with a numerical display of numbers from 00 to 99.
3. Verify that the pedestrian indications for the UPRAISED HAND and Walking Person are filled in to provide a solid
indication. Do not supply outlines or hollow pedestrian indications for the UPRAISED HAND and Man.
B. Equipment
1. General
a. Verify that the message numbers 00 to 99 are a minimum of 9 in. (228 mm) in height and consist of two
rows of LEDs.
b. Verify the module fits in the pedestrian signal housing without modification to the housing and requires no
special tools for installation.
c. Supply LED signal modules that are weathertight when mounted in the traffic signal housing.
d. Supply life data from the LED Signal Module manufacturer to calculate the expected useful life.
e. Supply modules with permanent markings of the date of manufacture and date of installation.
f. Verify that Pedestrian Signal Modules have prominent and permanent markings to designate the
orientation of the signal module in the pedestrian signal housing. The marking shall be an up arrow or the
word UP or TOP.
2. Optical
a. Provide test data from an independent laboratory to verify that the performance of the product meets
current ITE requirements.
b. Supply Portland Orange LEDs that utilize AllnGap technology, either AS (Absorbing Substrate) or TS
(Transparent Substrate) and do not exhibit degradation of more than 30% of their initial light intensity
following accelerated life testing (operating at 185°F [85°C] and 85% humidity, for 1,000 hours). AlGaAs
technology is not acceptable.
c. Verify that the individual LEDs are wired such that a catastrophic failure of one LED will result in the loss
of not more than 5% of the signal module light output.
d. The failure of a single LED in a string causes loss of light from only that LED, not the entire string
or indication.
e. Provide control circuitry that prevents the current flow through the LEDs in the off state to avoid false
indications as may be perceived by the human eye during daytime and nighttime hours.
f. Verify that the LED signal module is operationally compatible with existing or new conflict monitors (Model
208, Model 2010, Model 2018, ITS Cabinet CMU and AMU).
g. Verify that the LED Signal Module is operationally compatible with existing or new load switches.
h. Verify that the intensity of the LED signal module does not vary by more than 10% over the voltage range
as specified in Table 21.
i. Verify that the LED signal modules maintain not less than 90% of the required intensity, as defined by the
ITE intensity standards for LED traffic signal modules.
j. Verify that each module provides an average luminosity of at least 3,750 candela per square meter of
lighting surface for the UPRAISED HAND and 5,300 candela per square meter for the man symbol. 1843
SECTION 925 — Traffic Control Signal Equipment
k. Verify over the temperature range of –40ºF to 165ºF (–40°C to +74°C) at 120 VAC when new and after 4
years of field installation.
l. Provide an exterior lens that is uniform and frosted to reduce sun phantom effect.
3. Electrical
a. Verify that the power factor is 90% or greater, at nominal rated voltage, at 77ºF (25°C), after 60 minutes of
operation.
b. Verify that the THD is less than 20% at rated voltage, at 77ºF (25°C) and that all LED traffic signal modules
follow FCC noise regulations.
c. Verify that the LED signal modules operate on line voltage, 120 VAC nominal, and can operate over the
voltage range of 80 VAC to 135 VAC.
d. Provide transient voltage suppression rated at 1,500 W for 1 ms and fusing with a maximum rating of 2 A
to minimize the effect and repair cost of an extreme over-voltage situation or other failure mode.
e. Verify the modules enable a reduction of the intensity of the light output in response to an input from the
traffic signal controller.
f. Verify the minimum light output when dimmed is not less than 30% of the minimum maintained luminous
intensity as defined in the applicable ITE Traffic Signal Face Module.
4. Operation
a. Supply LED modules that start counting when the flashing UPRAISED HAND indication starts and will
countdown to 0 when the steady UPRAISED HAND signal turns on.
b. Verify that the countdown numbers remain continuously illuminated through the flashing UPRAISED
HAND interval.
c. Verify that the unit maintains a consistent countdown during a short power failure (i.e., traffic controller
does not restart).
d. Verify that if traffic controller restarts that the countdown timer display is turned off until one full
pedestrian clearance cycle is timed.
e. Verify that the unit will turn off the counter if the steady UPRAISED HAND display starts while the
countdown timer is displaying a number other than 00.
925.2.16 LED Ramp Meter Enforcement Device Requirements
A. General
1. For each metered lane, provide one ramp meter enforcement device mounted on the back of one signal per
lane and wired directly to the red signal display.
2. This installation shall include a Red 44 LED Array (allnGaP), pixel housing, 6061 aluminum powder coated
swivel bracket, 2 in. (51 mm) lens, with an aluminum hood.
3. Mount and adjust per the Contract.
925.2.17 Vehicle Traffic Signal Face Requirements
A. General
1. Supply vehicle traffic signal faces that are 12 in. (305 mm) in diameter for traffic signal control applications.
2. Verify that 12 in. (305 mm) polycarbonate vehicle traffic signal faces meet the current ITE Vehicle Traffic
Control Traffic Signal Faces specification with the following modifications or clarifications:
a. Unless otherwise approved by the Department or noted in the Contract, supply traffic signal faces with
the following exterior color scheme: 1844
SECTION 925 — Traffic Control Signal Equipment
i. Front face, including doors and visors, flat black with Highway Yellow signal housing (back).
ii. All flat black face, doors, visors, and signal housing.
b. Provide housing and housing door that are one-piece injection-molded UV and heat-stabilized
polycarbonate resin with the color impregnated in the material.
3. Provide the vehicle signal LED in all sections either circular or arrow modules per the Contract.
4. Provide a weathertight seal with the LED module.
5. Provide traffic signal faces that provide a positive method of holding the lens preventing rotation.
6. Lens clips that do not apply firm pressure to the lens gasket to avoid rotation are not acceptable.
B. Traffic Signal Face Visor Requirements
1. Typically, visors are one-piece tunnel type and removable unless specified otherwise in the Contract.
2. Unless otherwise specified by the Department, provide black traffic signal face visors.
3. Verify that visors are polycarbonate and at least 9 in. (225 mm) deep for 12 in. (305 mm) heads.
4. Special angle visors are full circle with the long side at least 18 in. (450 mm) deep.
5. Verify that visors provide a positive method of attaching to the door of the traffic signal face and do not enable
rotation. An acceptable method is to provide tabs that use stainless steel screws.
C. Universal Closure Kit Requirements
1. Supply a universal signal closure kit to seal the traffic signal face at either the top or bottom.
2. Verify that the kit will fit any manufacturer’s traffic signal face (top or bottom) without the use of special tools
or modification.
3. Verify that the gasket is 60-70 durometer neoprene.
4. Verify that the closure cap is injection molded ABS plastic.
5. The plastic is to be loaded with UV stabilizers.
6. Verify that the adapter bar is made so that it will secure the closure cap and compensate for varying thickness
of traffic signal faces.
7. Provide two #10 (9 mm) screws to fit any manufacturer’s traffic signal face. Verify that one screw is 0.75 in. (19
mm) in length and the second screw is 1 in. (25 mm) in length.
8. Pack each assembly in a clear plastic bag. Mark the bag with the manufacturer’s name and part number.
9. Include the universal signal closure kit in a package containing the span wire clamp and Tri-Stud wire
entrance fitting.
10. Verify that the closure cap is molded to closely match the color of the traffic signal face (highway yellow).
11. The adapter bar and screws are to be zinc plated steel.
D. Traffic Signal Face Backplate Requirements
1. Provide backplate that is designed to shield a traffic signal face from background distractions.
2. Provide backplate with louvers.
3. Fabricate the backplates from UV stabilized polycarbonate, ABS plastic, or aluminum material.
4. Thickness
a. Polycarbonate backplates minimum of 0.15 in. (4 mm) thick.
b. ABS backplates minimum of 0.05 in. (1 mm) thick.
c. Aluminum backplates minimum of 0.06 in. (1.5 mm) thick.
1845
SECTION 925 — Traffic Control Signal Equipment
5. Color
a. Provide backplate constructed with a finished color of flat black.
b. Aluminum backplates should be finished with a durable, flat black colored powder coat.
6. Perimeter
a. Design the backplates to extend beyond the traffic signal face to a minimum of 4 in. (100 mm) and a
maximum of 6 in. (150 mm) on all sides and have all corners rounded with minimum 2 in. (50 mm) radii.
b. To provide a rectangular appearance at night, apply 2 in. (50 mm) yellow fluorescent TP IX retroreflective
strip along the backplate perimeter.
7. Mounting
a. Design the backplates with predrilled holes to provide for simple attachment to the specified brand, size,
and configuration of traffic signal face with all mounting hardware included.
b. Verify that the backplates do not interfere with the signal mounting hardware.
E. Hardware for Mast Arm Mounting Requirements
1. Verify that traffic signal faces are rigidly mounted to the mast arm.
2. Fabrication
a. All aluminum parts shall have a chromate finish.
b. All steel parts shall have a galvanized finish.
c. This item will be approved upon submittal of catalog cuts.
d. Refer to Standard Detail Drawings for additional information.
3. Provide mounting hardware that is in accordance with the following:
a. Adjustability
i. Provide rotational adjustment about the bracket axis.
ii. Provide vertical adjustment.
iii. Provide rotational adjustment about the mast arm.
iv. Provide rotational adjustment from the vertical plane.
b. Attachment
i. Verify the bracket is provided with aircraft-grade galvanized steel cables with stainless steel fastening
hardware and make a minimum of two wraps around to fasten the bracket to the arm.
ii. Verify the bracket is easily adjustable to fit all sizes of round, elliptical, or other shaped structure
without special tools or equipment.
c. Signal/Sign Accommodations
i. Verify the bracket attaches to the signal or sign to ensure maximum rigidity.
ii. When clamping the signal top and bottom, verify a standard bracket accommodates all major signal
manufacturer’s signal for three, four, and five section traffic signal face configurations.
d. Wiring
i. All electrical wiring shall be completely concealed with the bracket.
ii. The vertical support shall be a gusseted C-shaped extruded aluminum tube to accommodate the
signal cable regardless of vertical positioning of the tube. 1846
SECTION 925 — Traffic Control Signal Equipment
e. Materials
i. The upper and lower arms shall be cast 319 aluminum or equivalent.
ii. The lower arm shall be internally threaded to accommodate the threaded vertical support tube.
iii. Verify the lower arm is furnished with plastic covers that slide and snap into place.
iv. Both arms shall have 72 tooth serrations cast into the arm to ensure a positive lock with signal
housing and shall be secured about their rotational axis with sets crews.
v. Verify the arms have a tri-bolt arrangement for attachment to the signal housing.
4. Provide gusseted tube vertical support that is extruded from 6063-T6 aluminum.
5. Verify the tube includes a vinyl closure strip.
6. Verify the mast arm clamp assembly is cast from 713 aluminum alloy or equivalent.
7. Provide an assembly that enables 360 degrees of rotation with no internal bracing obstructing the
center opening.
8. Provide two aircraft-grade galvanized steel cables that have minimum tensile strength of 100,000 psi (690 mPa).
9. Verify that each bracket is complete with necessary bolt, washers, gaskets, and miscellaneous items to
enable assembly of the signal to the bracket and the bracket to the mast arm.
F. Traffic Signal Face Louver Requirements
1. Verify that the units can be installed and programmed in accordance with the manufacturer’s instruction on
visors that are recommended by the manufacturer.
2. Have the programmable louver display approved by the Department prior to placing the signal in stop and
go operation.
3. If special tools are required for louver adjustment, provide one set per project to the District Signal Manager.
4. If special tools are required for visor adjustment, provide one set per project.
5. Coordinate delivery of tools with the District Signal Manager.
6. Verify that louvers (with the vanes oriented vertically) are directional with a 7-degree cutoff right of center.
7. Rotating the louver 180 degrees will produce a 7-degree cutoff left of center.
8. Provide 12 in. (300 mm) louvers with 5 vanes.
9. Finish all louvered surfaces in flat black.
10. Verify that programmable louvers are directional with a 7-degree cutoff and that all louver surfaces have a flat
black finish.
G. Hardware for Traffic Signal Face Pole Mounting Requirements
1. Verify this item consists of hardware adequate for the specific mounting.
2. Verify that this item consists of hardware as shown in the standard details.
3. This item will be approved upon submittal of catalog cuts.
4. At a minimum provide the following hardware: 1.5 in. (38 mm) pipe nipples of die cast aluminum that are a
minimum of 12 in. (305 mm) and threaded with 1.5 in. (38 mm) NPS threads on either end.
5. On the upper and lower arm there shall be a serrated 72 tooth boss with set screw.
6. Use a tri-stud adaptor to attach the signal housing to the mounting hardware.
7. The upper arm shall have a neoprene gasket to provide weathertight fit.
8. Provide hub plates for pole mounting that are appropriate for the mounting (round or flat).
9. Hardware shall die cast aluminum alloy 380 or extruded.
1847
SECTION 925 — Traffic Control Signal Equipment
10. All die cast parts shall be cleaned in an alkaline cleaning compound.
11. Extruded parts shall have a chromate conversion coating to provide proper base for paint adhesion.
12. The assembly shall be coated with two coats of oven baked enamel in addition to the primer coat.
13. All other hardware shall be stainless steel.
925.2.18 Optically Programmed Traffic Signal Face Requirements
A. General
1. Supply traffic signal faces that permit the visibility zone for the red, yellow and green indications to be
determined optically and require no hoods or louvers. The projected indication may be selectively visible or
veiled anywhere within 15 degrees of the optical axis.
2. Verify that the projected indication conforms to ITE transmittance and chromaticity standards.
3. Verify no indication results from external illumination and that one light unit does not illuminate a second. The
components of the optical system include the lamp, lamp collar, optical limiter-diffuser, and objective lens.
4. Verify that the optical system accommodates projection of diverse selected indications to separate portions of
the roadway such that only one indication will be simultaneously apparent to any viewer.
B. Equipment
1. Fabrication
a. Provide an LED lamp module that is a direct replacement for the incandescent lamp.
b. Verify the lamp modules are on the CalTrans QPL for LED programmed visibility modules.
c. Provide unit that operates over the voltage range of 80 to 135 VAC.
d. Verify the unit provides a minimum luminous intensity of 500 candela and does not exceed 18 W at
25°C (77°F).
e. Couple the lamp to the diffusing element with a collar including a specular inner surface. The diffusing
element may be discrete or integral with the convex surface of the optical limiter.
f. Supply an optical limiter with an accessible imaging surface at focus on the optical axis for objects 900 to
1,200 ft. (270 to 360 m) distance and permit an effective veiling mask to be variously applied as
determined by the desired visibility zone.
g. Provide optical limiter with positive indexing means and composed of heat-resistant glass.
h. Verify that the objective lens is a high-resolution, planar incremental lens hermetically sealed within a flat
laminate of weather resistant acrylic or approved equal.
i. Supply a lens that is symmetrical in outline and that may be rotated to 90-degree orientation about the
optical axis without displacing the primary image.
2. Mounting
a. Supply signals that mount to standard 1.5 in. (38 mm) fittings as a single section, as a multiple section
face, or in combination with other signals.
b. Provide signal sections with an adjustable connection that permits incremental tilting from 0 to 10 degrees
above or below the horizontal while maintaining a common vertical axis through couplers and mounting.
c. Verify that terminal connections permit external adjustment about the mounting axis in 5-degree increments.
d. Verify that the signal is mountable with ordinary tools and capable of being serviced with no tools.
e. Supply attachments such as backplates or adapters that conform and readily fasten to existing mounting
surfaces without affecting water and light integrity of the signal.
f. Supply traffic signal faces with tri-studs for mounting.
1848
SECTION 925 — Traffic Control Signal Equipment
3. Electrical
a. Supply lamp fixtures that comprise a separately accessible housing and integral lamp support indexed
ceramic socket and self-aligning, quick release lamp retainer.
b. Verify that electrical connection between case and lamp housing can be accomplished with an interlock
assembly that disconnects lamp holder when opened.
c. Include a covered terminal block for clip or screw attachment of lead wires for each signal section.
d. Use concealed No. 18 AWG, stranded and coded wires to interconnect all sections to permit field
connection within any section.
4. Photo Controls
a. Verify that each signal includes integral means for regulating its intensity between limits as a function of
the individual background illumination.
b. Verify that lamp intensity is not less than 97% of uncontrolled intensity at 10,750 lux and reduces to 15%
+/-2% of maximum at less than 10,750 lux.
c. Verify that response is proportional and essentially instantaneous to detectable increase of illumination
from darkness to 10,750 lux and damped for a decrease from 10,750 lux.
d. Verify that the intensity controller is comprised of an integrated, directional light sensing and regulating
device interposed between lamp and line wires.
e. Verify that intensity controller is compatible with 60 Hz input and responsive within the range 105 to 135 VAC.
f. Output may be phase controlled but verify that the device provides nominal terminal impedance of 1,200
W open circuit and a corresponding holding current.
925.2.19 Blank-Out Sign Requirements
A. General
1. Provide sign with a clearly visible and definable legend at a distance of 500 ft. (152 m).
2. Provide hardware to mount the sign on standard 1.5 in. (38 mm) pipe brackets or to mount directly to signal
mast arms or span wire or as outlined in the contract.
3. Supply blank-out signs capable of displaying one message at a time in one direction.
B. Equipment
1. Sign Enclosure
a. Use a case formed from aluminum extrusion F1-6-E and a special aluminum door frame angle.
b. For Alloy 6063-T5, verify that the wall is at least 0.075 in. (2 mm) thick and the corners and joints are at
least 0.080 in. (2 mm) thick.
c. Use filler arc for all welding.
d. Verify all hinges and fastening hardware, nuts, bolts, fasteners on the housing, and internal components
are stainless steel.
e. Use a BR-type take-apart door hinge and draw bolt.
f. Furnish one P-15 1.5 in. (38 mm) hub on the top surface and bottom if mounted to a mast arm.
g. Prime the entire case with zinc chromate, bake the inside with two coats of non-yellowing white, and
paint the outside with two coats of highway yellow or flat black as specified in the Contract.
2. Electrical
a. Verify that all blank-out signs are LED and conform to current ITE standards.
b. Supply all signs with the necessary mounting hardware to provide for mounting as shown in the contract.
1849
SECTION 925 — Traffic Control Signal Equipment
c. Provide mounting for one-way or two-way configurations.
d. Obtain approval for messages and letter dimensions from the Department.
3. Sun Phantom Screen
a. Attach to each sign a heavy-duty aluminum louver-type sun phantom screen covering the entire sign face.
b. Slant the louvers down enough to eliminate the sun glare without obstructing the view of the sign face.
4. Painting
a. Paint the signal surfaces, inside and out, with two coats of oven-baked enamel in addition to the
primer coat.
b. Paint the non-illuminated portions of the signal face black.
c. Paint the housings, brackets, fittings, etc., highway yellow.
5. Lens
a. Use a fabricated, three-section Plexiglas lens clear face, with or without legend, that can accept a silk-
screened legend on the first surface.
b. Provide a thickness of at least 0.31 in. (8 mm).
925.2.20 Lane-Use Control Signal Requirements
A. General
1. Verify that all lane-use control signals are LED and conform to current ITE publication Traffic Control Signal
Indicators-Light Emitting Diode (LED) Signal Modules.
2. Supply all lane-use control signals with the necessary mounting hardware to provide for mounting as shown in
the contract.
3. Provide mounting for one-way or two-way configurations.
B. Equipment
1. Weight
a. Provide one-way lane-use control units that do not exceed 50 lb. (23 kg).
b. Provide two-way lane-use control units that do not exceed 60 lb. (27 kg).
2. Color
a. Verify that the color of lane-use control signal indications is always visible for 0.25 mile (0.38 km) under
bright sunny conditions.
b. Provide lane-use control signals with a visibility angle of a minimum of 60 degrees.
3. Housing
a. Verify that the housing of each signal is polycarbonate or a one-piece corrosion-resistant aluminum alloy
die casting or equal and meets current related ASTM specifications.
b. Verify that all configurations are balanced to provide a plumb hanging unit.
c. Verify that all components are readily and easily accessible from the open door.
4. Housing Door
a. Verify that the housing door is one-piece corrosion-resistant aluminum or polycarbonate and meets
current related ASTM specifications.
b. Provide two substantial door hinges with stainless steel hinge pins.
c. Verify hinges are on the left side of each section with a latch boss on the right side.
1850
SECTION 925 — Traffic Control Signal Equipment
d. Provide stainless steel dual eye bolt latches or similar approved devices to securely close and latch the
housing door.
e. Equip the housing or door with a continuous molded neoprene gasket to make the interior of the unit
dustproof and weathertight.
5. Wiring
a. Provide each signal housing with a complete terminal board.
b. Verify that one side of the terminal strip accommodates socket leads and the other side accommodates
field wires.
c. Verify that the terminal board provides separate wiring of each symbol.
d. Verify each lamp is separately wired to a terminal block located in each housing.
e. Provide each lamp holder socket with color-coded leads.
f. For combination symbols, color-code socket leads separately to distinguish between red X, yellow X, or
downward arrow symbols.
g. Provide leads that are No. 14 AWG type THW, 600 VAC, and fixture wire with 194ºF (90°C)
thermoplastic insulation.
6. Visors
a. Provide visors not less than 12 in. (305 mm) long for multiple unit and 7 in. (175 mm) long for single unit
signals for each signal face.
b. Verify that the visors are constructed of sheet aluminum or polycarbonate and encompass the top and
sides of each section.
7. Painting
a. Paint all signal surfaces, inside and out, with two coats of oven baked enamel in addition to the
primer coat.
b. Paint the insides of the visors flat black.
c. The non-illuminated portions of the signal face black or dark gray and all housings, brackets, and fittings
highway yellow.
8. Hardware and Fittings
a. Supply all necessary fittings, pipe brackets, hangers, hubs, etc., for the type of mounting specified.
b. Verify all fittings are aluminum or galvanized coated to prevent rust and corrosion.
9. Sun Phantom Screen
a. Provide each signal face with a screen that substantially counteracts the sun phantom effect.
10. Signal Display
a. Verify that the symbols, which are on an opaque black or dark gray background, meet ITE requirements
and are blacked out when not illuminated.
11. LED Optical System
a. Verify that each separate color indication in a sign face is illuminated by independent LEDs.
b. Verify that the green arrow indication does not utilize the same termination points as the X indication.
c. Verify that total power required for single indication does not exceed 250 W.
d. Verify that all modules are contained behind a weathertight signal face or lens assembly.
e. Verify that the entire optical system is weathertight and is not vulnerable to extremes in temperature
or moisture. 1851
SECTION 925 — Traffic Control Signal Equipment
925.2.21 Pedestrian Traffic Signal Face Requirements
A. General
1. The illumination, the UPRAISED HAND, and WALKING PERSON shall meet the color, luminosity, dimensions
and other specifications in the ITE publication Pedestrian Traffic Control Signal Indicators-Light Emitting Diode
(LED) Signal Modules.
2. Provide each section with a visor encompassing the top and sides of the signal face of a size and shape to
shield the lens from external lighted sources. An acceptable option is a Z-crate or louver type visor for
mounting over the pedestrian signal face.
3. Verify that pedestrian indications are distinguishable to the pedestrian both day and night and at all distances
from 10 ft. (3 m.) to the full width of the areas to be crossed.
4. Use only internal illumination.
5. Verify that an opaque material obscures all areas of the face or lens, except for the message.
6. Verify that when not illuminated, the symbols are not to be distinguishable by pedestrians at the far end of the
crosswalk they control.
B. Equipment
1. Fabricate the housing of one-piece cast aluminum alloy with two integrated hinge lugs, screw slots, and
openings at each end.
2. Fabricate the door of one-piece cast aluminum alloy with two hinge lugs cast on top of the door and two latch
points cast on the bottom.
3. Provide hinge pins of stainless steel to attach the door to the housing and two eye bolts and wing nuts on the
other side of the door.
4. Provide door with a neoprene gasket creating a weathertight, dustproof seal when closed.
5. Supply pedestrian traffic signal faces with a black face and a yellow body, unless otherwise specified in
the contract.
C. Pedestal Pole Requirements
1. Furnish pedestal poles according to type and overall length shown in the Contract.
2. Poles are made of one continuous piece of bare finish spun aluminum from top to base connection for the
entire height of the pole.
3. Pedestal pole mounting adapter shall rigidly attach to the sign case’s structural bracing.
4. Cable entrance to the sign case shall be through the inside of the pole.
5. The shaft, of appropriate shape, may or may not be uniformly tapered from butt to tip.
6. A pole used to support only a traffic signal may be tapered.
7. Fabricate pole caps, when required, of cast material, and secure in place with set screws.
D. Pedestal Pole Base Requirements
1. Verify that the base meets current AASHTO breakaway requirements.
2. Provide test reports from an FHWA approved independent laboratory certifying that the base has been tested
and meets applicable requirements.
3. Supply a statement of certification from the FHWA stating such tests have been accepted and approved.
4. In order to prove structural soundness, provide certification from a recognized independent structural
laboratory that the base will withstand a bending moment of 10,750 ft.-lb. (14,575 N-m).
5. Verify that all design radii are smooth and intact.
1852
SECTION 925 — Traffic Control Signal Equipment
6. Verify that the exterior surface finish is smooth and cosmetically acceptable by being free of molding fins,
cracks, and other exterior blemishes.
7. Fabricate from new aluminum ingot.
8. Minimum requirements are provided in Table 22.
Table 22 – Minimum Material Requirements for Pedestrian Pole Bases
Aluminum Alloy No. 319
Elongation [% In 2 in. (50 mm)] 2.5
Tensile Strength, KSI (MPa) 34 (234)
Brinell Hardness 85
Yield Strength, KSI (MPa) 19 (131)
Shear Strength, KSI (MPa) 232 (1600)
9. Verify this item consists of square cast aluminum with bare finish and has a minimum weight of 21 lb. (9.5 kg).
10. Thread the upper end to receive a 4 in. (100 mm) National Pipe Thread (NPT) pipe shaft.
11. Design the base so that it may be fastened to a foundation with four 0.75 in. (19 mm) anchor bolts located 90
degrees apart on the bottom of the base.
12. Provide slots in the bottom of the base 1.5 in. (38 mm) wide and 2.5 in. (63 mm) long measured along the
circumference of the bolt circle, enabling a proper fit even if the bolts are placed slightly off center.
13. Design the base to accommodate bolt circles of a minimum of 12 in. (305 mm) through a maximum of 14.5 in.
(363 mm) and anchor bolts with a minimum of 0.63 in. (16 mm) through 1.0 in. (25 mm) diameter.
14. Provide a plastic door that meets the following requirements:
a. Attach the door to the base using one socket button head screw to prevent unauthorized entry.
b. Verify that the door opening is free of burrs and sharp edges and is no less than 8.5 in. (213 mm) square.
c. Verify that the door is injection molded from ABS plastic to deter vandalism and theft, and has the
following properties provided in Table 23.
Table 23 – Minimum ABS Plastic Requirements
TEST ASTM METHOD VALUE
Tensile @ Yield [0.13 in. (3 mm)] D638 6,600 psi (45,500 kPa)
Flexural @ Yield D790 11,000 psi (75,850 kPa)
Rockwell Hardness D785 101 (R Scale)
Notched Izod D256 5 ft.-lb../in. (0.03 N-m/mm)
15. Verify that the door exhibits the following properties:
a. Has an edge thickness of 0.25 in. (6 mm) and a minimum thickness of 0.156 in. (4 mm).
b. Contains flame-retardant material, meeting or exceeding UL 94 test H.B.
c. Bare aluminum tone, unless otherwise specified.
d. Contains UV inhibitors and stabilizers for protection against UV degradation.
1853
SECTION 925 — Traffic Control Signal Equipment
e. Is injection molded with a smooth front finish.
f. Has flat and straight surfaces without blisters, buckling, or warping.
g. Has reinforcing ribs.
h. Contains two injection molded lugs on the bottom of the door with slots of the proper width and depth to
fit the base door opening.
16. Supply the base with a set of four anchor bolts, 0.75 in. (19 mm) diameter by 18 in. (450 mm) in length, with
material per ASTM 572 and galvanized per ASTM 153.
17. Supply one hex nut and one flat washer with each bolt.
E. Pedestal Pole Foundation Anchor Assembly Requirements
1. Provide baseplate that is steel and conforms to ASTM A 36 material.
2. Provide pipe with helical blade that is manufactured from ASTM A-53 ERW Grade B Steel.
3. Provide foundation anchor assembly that is 4 in. (100 mm) in diameter by 56 in. (1,400 mm) with a single
helical blade and a square fixed baseplate with combination underside holt-head retainer and dirt scrappers
enabling flush-mount with the ground.
4. Verify 4 in. (100 mm) pipe has 2 in. (50 mm) by 3 in. (75 mm) entrance hole 18 in. (450 mm) below the
steel plate.
5. Verify the anchor assembly is hot dipped galvanized finish after fabrication and complies with ASTM A 123.
6. Verify baseplate has four slotted mounting holes to fit bolt circles from 7.75 in. (195 mm) to 14.75 in. (375 mm).
7. Provide four slotted mounting holes with a 0.75 in. (20 mm) keyhole slot to permit bolt installation and
replacement from the top surface without digging under the baseplate.
8. Verify assembly is furnished with:
a. Four 0.75 in. (20 mm) -10NC x 3 in. (75 mm) square head galvanized ASTM A 325 anchor bolts
b. Four 0.75 in. (20 mm) plain flat galvanized washers
c. Four 0.1875 in. (5 mm) thick galvanized plate washers
d. Four 0.75 in. (20 mm) galvanized hex nuts
925.2.22 Messenger and Guy Strand (Span Wire) Requirements
A. General
1. Verify that all messenger and guy strand (span wire) conforms to ASTM A 475 extra high strength grade or
better with a Class A coating, 7-wire span wire.
2. Verify 0.25 in. (6 mm) messenger and guy strand are used to support interconnect cable or as tether spans.
3. Messenger and guy strand 0.31 in. (7 mm) shall be used only where it is essential to match an existing
0.31 in. (7 mm) span wire that will not be replaced as part of a new installation.
4. Verify all span wire for traffic signal faces, blank-out sign, optically programmed heads, lane control signs, standard,
aerial, or sidewalk guys uses a minimum messenger and guy strand 0.38 in. (9 mm) as a minimum size.
B. Bull Ring Requirements
1. Provide bull rings that are galvanized weldless steel 0.63 in. (16 mm) diameter.
2. Submit catalog cuts for approval.
1854
SECTION 925 — Traffic Control Signal Equipment
C. Balance Adjuster Requirements
1. Verify the balance adjuster consists of hardware that is cast from 316 Stainless Steel or 65-45-12 Ductile Iron
or equivalent.
2. Verify castings are free of voids, pits, dents, molding sand, and excessive grinding marks.
3. Exterior surface shall be cosmetically acceptable and free of molding fins, cracks, and other exterior blemishes.
4. All hardware shall be supplied and be stainless steel or galvanized.
D. Lashing Rod Requirements
1. Verify that all lashing rods are sized in accordance with messenger and cable diameters to be supported.
2. Provide lashing rods that are of the same material as the messenger or guy strand.
E. Stainless Steel Lashing Wire Requirements
1. Provide lashing wire that is Type 316 stainless steel with 0.045 in. (1 mm) diameter.
F. Cast Aluminum Span Wire Clamp Requirements
1. Provide an exterior surface finish that is smooth and cosmetically acceptable, free of molding fins, cracks, and
other exterior blemishes.
2. Verify that all design radii are smooth and intact.
3. Equipment
a. Provide span wire clamps that are cast from Aluminum Alloy 713 or equivalent, free of voids, pits, dents,
molding sand, and excessive foundry grinding marks.
b. Verify that span wire clamps are fabricated from aluminum ingot with minimum requirements in Table 24.
Table 24 – Minimum Requirements for Span Wire Clamps
Aluminum Alloy No. 713
Yield Strength, ksi (MPa) 25 (172)
Tensile Strength, ksi (MPa) 35 (240)
Brinell Hardness 75
Elongating [% in 2 in. (50 mm)] 3
c. Verify that the span wire clamp can accommodate cables 0.25 in. (6 mm) to 0.63 in. (16 mm) diameter.
d. Verify that the weight is less than 1.75 lb. (0.8 kg) with hardware.
e. Verify that the span wire clamp has a minimum overall length of 7 in. (175 mm).
f. Verify that the span wire clamp has a centerline dimension from cable to clevis pin of 2 in. (50 mm)
[±0.5 in. (13 mm)].
g. Verify that the span wire clamp has a cast aluminum cable bar to protect the cable when tightening
the U-bolts.
h. Verify that the span wire clamp has a mounting opening of 0.75 in. (19 mm) [±0.03 in. (0.8 mm)].
i. Verify that the span wire clamp has 0.5 in. (13 mm) 13 NPT U-bolts with 0.5 in. (13 mm) lock washers
and nuts. 1855
SECTION 925 — Traffic Control Signal Equipment
j. Verify that the clevis pins are 0.63 in. (16 mm) diameter with a length of 2.25 in. (56 mm) and secured with
a hump back stainless-steel cotter pin.
k. Verify that the clamp and cable bar have a chromate conversion coating to help resist oxidation.
l. Verify that the clevis pin and hardware are galvanized per ASTM A 123/A 123M or stainless steel.
G. Cast Aluminum Tri-Stud Span Wire Entrance Fitting Requirements
1. Verify that the all hardware is galvanized or stainless steel.
2. Verify that the exterior surface finish is smooth and cosmetically acceptable, free of molding fin, cracks, and
other exterior blemishes.
3. Equipment
a. Verify that the Tri-Stud Span Wire Entrance Fittings are cast from Aluminum Alloy 713 or equivalent, free
of voids, pits, dents, molding sand, and excessive foundry grinding marks.
b. Verify that the all design radii are smooth and intact.
c. Verify that the Tri-Stud Span Wire Entrance fitting has a mounting support at the top of the wire entrance
0.69 in. (17 mm) thick [±0.07 in. (1.5 mm)].
d. Verify that the Tri-Stud Span Wire Entrance fitting weight is not less than 1.75 lb. (0.8 kg) with hardware.
e. Verify that the mounting support has at least six clevis openings for adjustment with suspension bracing
between every two openings.
f. Verify that the Tri-Stud Span Wire Entrance has a minimum of 0.5 in. (13 mm) diameter throughout for
wire access and that wire access is free of burrs and casting webs.
g. Verify that the wire entrance opening is recessed and has a neoprene grommet with sealed membrane
sections.
h. Verify that the traffic signal face attachment end is serrated and has a minimum of 3-traffic signal face
centering bosses extending 0.19 in. (5 mm) from the serrations.
i. Verify that the serrations have a 72-tooth design to match the traffic signal face.
j. Verify that three stainless steel studs are cast into the wire entrance fitting.
k. Verify that the studs are 0.31 in. (7 mm) and extend 1.5 in. (38 mm) [±0.13 in. (4 mm)] beyond the serrations.
l. Provide each Tri-Stud span wire entrance fitting with a Tri-Stud hardware kit.
m. Verify that the Tri-Stud Span Wire Entrance Fitting has a chromate conversion coating to provide a proper
base for paint adhesion.
n. Verify that the assembly matches the display housing and baked in a drying oven after painting.
925.2.23 Timber Pole Requirements
A. General
1. Verify that all timber poles meet the requirements of Section 861 . 2. Poles must be inspected and tested by the Department’s Office of Materials and Testing and hammer
stamped by the inspector.
B. Equipment
1. Verify that all poles have a brand or stamp 10 ft. (3 m) from the butt that notes the type wood, date of
manufacture, manufacturer, class, and length.
2. Verify that all timber poles that have guy attachments or support span wire or arms that suspend traffic signal
faces over the roadway or sidewalk are Class II. 1856
SECTION 925 — Traffic Control Signal Equipment
3. Poles that support loop lead-in, messenger, or communications cable that does not have guy attachments
may be Class IV size.
4. Verify that all poles meet the requirements in Table 25 unless otherwise noted in the Contract.
Table 25 – Minimum Circumference of Timber Poles
Class Nominal Length, ft. (m) At 6 ft. (2.4 m) from butt, in. (mm)
II 30 (9) 34.0 (860)
II 35 (10.5) 36.5 (930)
II 40 (12) 38.5 (980)
II 45 (13.5) 40.5 (1,030)
II 50 (15) 42.0 (1,070)
IV 30 (9) 29.5 (750)
IV 35 (10.5) 31.5 (800)
IV 40 (12) 33.5 (850)
IV 45 (13.5) 35.0 (890)
C. Guy Guard Requirements
1. Verify that all guy guards are high-impact-resistant PVC with UV stabilizers added for retention of color.
2. Verify that insulators attach to the guy so that they cannot easily be removed.
3. Use guy guards that are yellow unless otherwise directed.
D. Guy Strain Insulator Requirements
1. Verify guy strain insulators are protected from the environment, including the effects of voltage, UV rays, and
acid rain by a fully bonded, electrically tack-free, and impenetrable silicone rubber sheath.
2. Each insulator shall be UL proof tested, and permanently marked to show date of test.
925.3 ConstructionConstruction for installation of Traffic Control Signal Equipment shall be according to Section 647 .
925.4 MeasurementMeasurement for the installation of Traffic Control Signal Equipment shall be according to Section 647 .
925.5 PaymentPayment for installation of Traffic Control Signal Equipment shall be according to Section 647 .. 1857
Referenced in this section
Show all 15 Sections that cite this one
Georgia revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Standard Specifications for Construction of Transportation Systems, 2021 Edition. Pages 1810–1867 of 2,050.
View official source ↗