614.01 614-1 SECTION 614 TRAFFIC CONTROL DEVICES DESCRIPTION
614.01 This work consists of the construction of traffic signs and sign structures, traffic signals
and systems, barricades, rumble strips, masking sign legends on new sign panels, providing and installing multi -directional steel sign break -away assemblies, and m odification of signposts and legends. This work shall be done per these specifications, the latest revision of the “Manual on Uniform Traffic Control Devices (MUTCD )for Streets and Highways” published by the FHWA and adopted by CDOT , the latest revision of the Colorado Supplement thereto, and in conformity with the details shown on the plans or established. This work includes the installation of single or double tubular steel signposts, supporting tubular sockets, and concrete footings at locations shown on the plans. MATERIALS
614.02 Signposts and Sign Structures. Concrete shall conform to the requirements of Section
601. Reinforcing steel shall conform to the requirements of Section 602. Steel for Signposts and Sign Structures shall conform to the material grade and type specified in the Contract. Steel plates, shapes, and bars shall conform to the requirements of Section 509. Tubular steel shall conform to the requirements of ANSI/AWS D1.1. Timber signposts shall conform to the following:
1.Species: Douglas Fir South or Douglas Fir Larch, Grade No.1
2.Finish: S4S
3.Moisture content: 19 percent or less
4.80 percent Free of Heart Center Before use, all timber shall be stored, banded and kept dry. All signposts shall be pressure treated according to AASHTO M -133 or AWPA Standards. All cuts, holes, and other related modifications made to the posts shall be treated per AWPA M -4. Underground portions of timber signposts, plus at least 6 inches above groundline, shall be treated according to AWPA Standard M4. Timber signposts size 6 inches by 6 inches shall be provided with two 2 -inch diameter holes through the neutral axis at right angles to the roadway for induced breakaway function, one drilled at 4 inches and one at 18 inches above the ground level. Tubular sockets shall be round 12 -gauge galvanized steel that meet the requirements of ASTM A787. Concrete footing shall be made of Class BZ Concrete. The Contractor may use an alternate material that meets the requirements for Class BZ concrete in Section 601, as approved by the Engineer. Structure backfill around concrete footings shall be Class 2, per Section 206. 614.03 614-2 614.03 Overpass Mounted Sign Bracket. Material for overpass mounted sign bracket shall conform to the structural steel requirements of Section 509.
614.04 Sign Panels. Sign panel materials shall conform to Section 713 and to the details
shown on the plans. Sign panels shall be produced per the retroreflective sheeting manufacturer’s recommendations. Layout and font design shall conform to the “Standard Highway Signs” published by FHWA. Font selection for guide sign legends shall conform to the most recent version of the “CDOT Sign Design Manual”. Sign layouts for special signs shall be per the detailed sign layouts proved on the plans or by the Engineer. Silk screen and digital process figures shall be per the plans and series figures described in the current editions of “Standard Highway Signs”, published by the FHWA, and the “Colorado Supplement to Standard Highway Signs”. All exposed lockbolt fastener heads on the faces of the sign panels shall be covered with material matching the background of the panel. All sign panels shall be identified with the month and year that the sign was manufactured. The date shall be located on the lower right side of the back of the sign panel and shall be approximately 1/4 inch high. The date shall be stamped or adhered onto the sign panel material for a permanent record. This work will be paid for as part of the Item.
614.05 Sign Illumination and Illuminated Signs. Electrical work shall conform to Section
613. Lens and reflectors for flashing beacons shall be of a type as described in the November 1998 edition of the Institute of Transportation Engineers ( ITE) Equipment Material Standards Chapter 2 Section 8.00, Traffic Signal Lenses, and Section 10, Reflectors. LED modules shall meet the requirements described in the November 1998 edition of the ITE Equipment Material Standards Chapter 2a, Sections 1 through 7.2.2.
614.06 Flashing Beacon. Flashing beacon shall be as shown on the plans. If solar power is
called for on the plans, or if the Engineer approves the use of solar power, then the beacon head shall be 12V LED type operated at 24 watts. The solar power system shall be capable of operating the flash ing beacon continuously for 10 days without any sunlight. The solar panel and battery power system shall be augmented to protect it from vandalism or theft. The solar power system shall be complete including all elements required for an operational installation.
614.07 Barricades . Wood used in barricades shall be untreated S4S and shall conform to
the applicable portions of subsections 710.07 and 710.08. Retroreflective sheeting shall be Type IV and shall conform to subsection 713.04. Underground portions of timber barricade posts, plus at least 6 inches above ground line, shall be painted with any preservative listed in AASHTO M 133. Any portion of a timber barricade not covered with reflective sheeting or treated shall be painted whit e per subsection 508.08 and the plan details.
614.08 Traffic Signal Materials.
a.General. At the Pre -construction Conference, the Contractor shall submit, for approval, a list of equipment and materials that will be installed. Each item shall be identified by trade name, size, and number. Materials shall conform to the requirements of Section 713, to the requirements shown on the plans or as designated, and to the following: 614.08 614-3 All electrical equipment shall conform to the standards of ITE, Institute of Electrical and Electronics Engineers (IEEE) , UL, or Electronic Industries Association (EIA), wherever applicable. In addition to the requirements of the plans, these specifications, and the special provisions, all materials and workmanship shall conform to the requirements of the National Electrical Code (NEC), Rules for Overhead Electrical Line Construction of the Colorado Public Utilities Commission; standards of ASTM, ANSI, and all local ordinances that may apply. Wherever reference is made to any of the standards mentioned above, the reference shall be construed to mean the code, order , or standard that is in effect on the date of advertisement for bids. Materials and equipment for traffic signal installations and modifications within existing traffic signal systems shall be compatible and the equipment interchangeable with the existing equipment. All traffic signal equipment supplied shall be of models that are currently manufactured by the suppliers of such equipment. The locations of signals, standards, controllers, services and appurtenances shown on the plans are approximate and the exact locations will be established by the Engineer in the field. Upon completion of the work, the Contractor shall submit record drawings or corrected plans, or any additional data required by the Engineer showing in detail all construction changes, including but not limited to wiring, cable, and location and depth of conduit. The Contractor shall submit two sets of schematic wiring diagrams for the traffic signal controller, the signal installation's light circuits and all auxiliary equipment including units and values for each component used to the Engineer. These diagrams shall show in detail all circuits and parts. Such parts shown thereon shall be identified by name or number and in such manner as to be readily interpreted. All diagrams, plans and drawings shall be prepared using graphic symbols shown in ANSI Y32.2, “Graphic Symbols for Electrical and Electronic Diagrams.” The cabinet drawings shall be non -fading prints using the xerography method. Blue line drawings will not be accepted. One copy of the controller cabinet diagram and the intersection and phase diagram as approved by the Engineer shall be placed in a heavy -duty plastic envelope with side opening and attached to the inside of the door of each controller cabinet. Manufacturer guarantees furnished with installed equipment shall be furnished to the Engineer. The extent of such guarantee will not be a factor in selecting the successful bidder. Steel incorporated into Traffic Signals shall conform to the material grade and type specified in the Standard Plans Steel plates, shapes, and bars shall conform to the requirements of Section 509. Tubular steel shall conform to the requirements of ANSI/AWS D1.1. 614.08 614-4 (b) Traffic Signal Controller s-General. The traffic signal controller shall be a Type 170E constructed per the FHWA -IP-78-16 specification except as revised in 614.08(b)1.,2., and
3.below. The controller assembly shall consist of a controller unit, cabinet and all necessary auxiliary equipment to provide the operation as shown on the plans. The output file sh all have eight "flash programming jumper blocks," one for each of the eight phases. The power distribution assembly shall be the PDA No. 2. The PDA No. 2 shall have field circuit breakers 1 -6 to provide 15 amperes of operating AC current to the field load switches. If one of the field breakers is set off, the indicating switch shall place power on the MC coil and FTR coils causing a flashing operation. The Prom Module shall be a 412B System Memory Module. The module shall comply with details and connections shown on the plans for the Model 170E Traffic prom Module. All electrical connections in and out of the module shall be through a printed circuit connector having two rows of 36 independent bifurcated contacts on 0.10- inch centers. The module shall be designed so that persons inserting or removing the assembly shall not be required to insert hands or fingers within the microprocessor unit housing this modular assembly. A handle or gripping device protruding no more than 1 1/4 inches from the front panel shall be attached to the front of the assembly. The front panel shall be connected to ground. All Inputs and Outputs shall be Tri State Buffered enabling them to drive a load consisting of 10 TTL gates and 200 picofarads. When this module is not being addressed, the data inputs and outputs shall be disabled into a high impedance state and the data I/O lines shall not source or sink more th an 100 micro amperes. All address inputs shall not load the bus by more than one TTL gate load and 100 picofarads. There shall be provided a positive method to prevent this module from being inserted upside down in the prom slot with the front panel of the 170E closed. The memory module shall consist of a minimum of three 28 -pin sockets, for JDEC pin compatible memory devices ranging in sizes from 4K X 8 (2732) to 32K X 8 (27356). The selection of address and backup power shall be made via soldered wire jumper options. One 28- pin socket shall be designed to house only EPROM memory devices. The remaining two 28- pin sockets shall be designed to house RAM, NOVRAM or EPROM memory devices. Solder jumper options shall route the optional battery backup power to each of these tw o sockets, when specified. When specified, the backup battery power shall enable volatile memory devices to retain the data in their memory in the event of a power failure or when the module has been removed from the 170E controller for a period of at leas t one year. The entire memory map address map shall be user definable such that each socket can be addressed independently. The decode shall be provided by bipolar prom. When the bipolar prom recognizes an address within the range of the prom module, the appropriate decode output shall become active thereby enabling the appropriate memory device. Resistors shall be used to pull up the memory select lines to the +5 Volt power bus if the device is selected for battery backup power. This shall provide data detention in th e event of a controller power failure. 614.08 614-5 There shall be provided on the 412B SYSTEM MEMORY MODULE a regulated 5 volts’ power supply, derived from the 12- volt supply available on the Prom Module. This supply shall provide a minimum of 500 milliamperes on the assembly. This 5 -volt supply shall power only the module address bus, the data bus and the bus buffers. There shall be a wire protect circuit to write protect the memory devices when power has been removed, and to delay writing for a short time after power has been restored. The 412B shall have provisions for an optional battery backup supply voltage for RAM devices when the power is removed from the module. This optional battery, when called for, shall be an AA size lithium battery. All modules shall be provided with a batter y disconnect switch and battery holder clip devices for the AA battery. The assembly shall operate and mate with all Model 170E Controller Units. The following configurations are required for the operation of Wapiti software used by CDOT . The 412B Prom Module shall be configured for a 27256 EPROM at address 8000- FFFF and NOVRAMs at 1000- 4FFF and 7000- 7FFF unless otherwise specified. When specified that the 412B Prom Module will be used for a master controller, a 27256 EPROM shall be used at address A000 -FFFF , a RAM shall be used at 8000 -9FFF , and NOVRAM configured for 0800 -4FFF and 7000 -7 F F F. The 170 PROM module shall be on the Colorado Qualified Products list.
1.170E traffic Signal Controller. Each controller shall be a Type 170E with 4 ACIA connectors and two modem slots per FHWA -IP-78-16 specifications except as noted below. In addition to the manual (as specified in the FHWA -IP-78-16 specifications) two “D” size (24-inch x 34.5 inch) drawings of all schematics and assembly prints contained in the manual shall be supplied for each twenty controllers or revision change. The 170E Controller shall come with a blank panel to cover the Prom Module opening if the CDOT chooses to use a Prom Module. This panel will have all the necessary hardware to be attached to the Front panel. FHWA -IP-78-16 Specifications Vendor's Testing Certification shall be modified to read, “The Vendor shall supply with each shipment a full test report of the quality control and final test conducted on each item.” In addition, the Contractor shall supply a statement with each 170E controller that the unit was tested per Section 1.8.5.3.3 as modified below. 1.8.5.3.3 shall be modified to read “A minimum 100 -hour burn -in of all modules. This burn-in shall include 48 hours of monitored testing at the high and low temperatures as described in 1.8.3.7.1 and 1.8.3.7.2.”
2.Training. The Contractor shall provide 16 hours of training at a site designated by CDOT . This training shall include but not be limited to Diagnostic Software and circuit theory and operation of the 170E controller. The training will be provided by a person knowledgeable in the operation and repair of the 170E controller, 332 and 336 cabinets, and associated diagnostic software. 614.08 614-6 3. Prom Module. The Prom Module shall be a separate item that shall be provided only when requested. The Prom Module shall be a 412B type Prom Module unless otherwise specified. When the equipment is supplied for a project the Contractor shall contact the Regional Supervisor to obtain the Traffic Program Revision that is to be provided.
c.Controller Cabinets. The controller cabinet shall be either a Model 332 or 336S as specified in the Contract. The 336S cabinet shall include a base extension assembly. Each cabinet shall be natural aluminum with anchor bolts per the FHWA -IP-78-16 specification. The input files shall meet the requirements of the split input file below. Unless otherwise specified in the Contract, the cabinet shall include the following: Table 614-1 CONTROLLER CABINET CONTENTS Quantity Item 2 Internal (front/back) fluorescent lamps 4 Model 430 Transfer Relays 2 Model 204 2 -Circuit Flasher (cube type, 25 AMP output) 12 Model 200 Load Switches (cube type, 25 AMP output) 3 Model 242 DC Isolators 6 Model 222 Loop Amplifiers 1 Model 210 Monitor with absence of red monitoring 1 New York 330 Pull -out Drawer Assembly 1 Auxiliary Detector Termination Panel Assembly 1 Transient Voltage Surge Suppression System A 20- conductor cable assembly for monitoring the red outputs of all signal load switches shall be provided and mounted to the back panel assembly. The cable shall be routed to the front of the assembly and be plugged into the connector on the front of the conflict monitor. A means of selecting the active red monitor channel shall be provided on the rear of the monitor panel. Selection shall be accomplished by means of a two -position jumper (shunt) with the center position wired to a red monitor input and select of 115V AC to the right and red load switch output to the left. Moving the jumper to the right will provide continuous red input and override, while moving a jumper to the lef t will attach the monitor channel to the corresponding load switch output. This jumper assembly shall be accessible while the intersection is in operation. Means shall be provided to prevent shock to personnel operating jumper selection devices. A minimum of 12 selections are required, eight phase selections and four overlap selections shall be provided with jumper selections. Red monitoring disable control shall be provided within the red monitor cable assembly. Pin six on TB02 shall connect to a 24V DC relay coil. This relay is designated RM control relay. The normally closed contacts shall provide 115V AC to the red monitor select line and pin 17 on the monitor cable. When a logic ground signal is applied to TB02 -6 the RM relay shall energize and open the cable. The relay power will be derived from the cabinet 24V DC cabinet power supply. 614.08 614-7 Electrical characteristics of the device that will be used for series transient protection on the 332 and 336S cabinet system shall include tests run using a Velonex 587 surge generator and Tektronix oscilloscope type 2430 or equivalent hardware. Using ANS I/IEEE 062.41- 1980 waveforms for normal mode and common mode ring wave and impulse tests, each unit shall comply with the following minimum characteristics:
1.Clamping level 400V peak normal mode and 500V peak common mode. Trace photos and other test related information will be available upon request.
2.EMI/EFI noise rejection derived via standardized 50- ohm insertion loss tests shall have amplitude of at least - 20db over a minimum spectrum from 50 kHz with a - 40db being the most desirable.
3.Diagnostics indicators shall clearly display the status of the suppression circuit. The indication shall warn of the loss of protection.
4.Transient energy suppression shall be in excess of 250 Joules.
5.Rated voltage is 120V AC with rated output current minimum 10 amperes single -phase operation. All of the above components provided on the project, excluding the signal monitor unit, shall be on the Colorado Qualified Products listing. Split input file shall be an SF 170 that will operate in the 332/336S cabinets. The Split Input File shall use the same form factors as the present (older) input file and shall be completely interchangeable with these older input files except as follows. The input file shall use a split 22 pin connector (2 rows of 22 pins) that provide for 44 unique contacts, rather than the 22 double contacts as provided by the former input file. This design shall interface electrically with the older two and four channel devices available under the 170 and NEMA TS1 specification as well as the newer two and four channel devices as specified in the TS2 NEMA specification. The input file shall be divided into two partitions. The first partition shall include the first eight slots from the left; the second partition shall include the next six slots. All 14 slots shall be able to be tied to one common communication drop if desired. The serial/TTL Transmit and receive pairs shall be wired across the back panel. TXO, DXO, and Ground0 serve the first eight slots; TX1, DX1 and Ground1 serve the next six slots. Black plane addressing is automatically assigned in the rear of the input file, such that: Slot 1 = Address 0 Slot 2 = Address 1....Slot 8 = Address 7 (all three -line low) Addressing from the front of any input device shall override the back plane addressing. Serial connections shall use a standard quick lock connection.
d.Magnetic Detectors . Magnetic vehicle detectors shall have a moisture -proof housing and shall be capable of withstanding all types of soil conditions. The magnetic vehicle detector shall be designed for underground operation and installed in a nonmetallic conduit housing. Magnetic detector amplifiers shall have a continuously adjustable sensitivity level control, which shall be adjustable over the full range of amplification of the unit. 614.08 614-8 Each magnetic detector shall be capable of being activated by a voltage induced in the coil of the sensing element by the passage of a vehicle at any speed from 3 to 80 miles per hour. Any vehicle passing within 18 inches of either end of the sensing element shall provide an output signal. Each amplifier shall be provided with an integral power supply. Each amplifier shall be designed to provide ease of maintenance with all electronic components readily accessible. All input and output circuits for each amplifier shall enter via a single MS connector, circuitry that shall be as shown in the following table: Table 614-2 CONNECTOR CIRCUITRY FOR MAGNETIC DETECTOR AMPLIFIERS MS Connector Circuit 18-8 Pin Magnetic Detector (-) A Magnetic Detector (+) B AC+, 120 volts C Chassis Ground D Detector Common E Output N.O. F Output N.C. G AC-, Grounded Conductor H All controls, indicator lights, fuse holders, and connectors shall be mounted on the front panel of the amplifier. The magnetic detector sensing element casing shall be constructed of nonferrous materials suitable for use in the environment that it will operate and shall be sealed to prevent the entrance of moisture. The sensing element shall be designed to facilitate easy installation, repositioning and removal.
e.Micro Loop Detectors . Micro loop detectors shall conform to the following and to the details shown on the plans. The sensing element shall be no larger than 2 inches in diameter by 4 inches high and shall contain no moving parts. The unit shall be a passive transducer that converts magnetic field intensity into inductance for use with conventional inductive loop detector units for the passage detection of vehicles. The operating field shall be 0.2 to 1.0 oersted; inductance: 20uH and DC resistance of 0.5 ohms plus 20uH and 3.2 ohms per 100 feet of probe cable. Each micro loop detector shall be capable of being activated by a change in magnetic field caused by the passage of a vehicle within the lane of required detection at any speed from 3 to 80 miles per hour. 614.08 614-9 The probe shall operate at temperatures from minus 35 to 165 °F and at a relative humidity of 0 to 100 percent including submersion in solutions of chemicals typical of roadway run - off. Lead-in cable shall be factory assembled, polyurethane jacketed, four conductor No. 22 American Wire Gauge ( AWG), and shall be of a length specified on the plans.
f.Pedestrian Push Buttons . Pedestrian push buttons shall be a piezo, direct push button contact type and shall consist of electronic control equipment , mounting hardware, and push button. The pedestrian push button shall be weatherproof, tamper -proof, constructed so that it will be impossible to receive any electrical shock under any weather condition, and operate on a voltage not to exceed 24 VAC. The housing shall be shaped to fit the curvature of the pole where it is attached to provide a rigid installation. Saddles shall be provided to make a neat fit when required. Materials for Pedestrian Push Button Post Assembly shall conform to the following:
1.The Pedestrian Push Button Post Assembly, sign, and push button shall conform to the following:
A.The latest version of the ADA Standards for Accessible Design, Chapter 3, Section 309 Operable Parts.
B.Current CDOT adopted Manual of Uniform Traffic Control Devices (MUTCD), Chapter 4E-Pedestrian Control Features.
C.NEMA TS 2 Section 2.1 requirements for Temperature and Humidity, Transient Voltage Protection, and Mechanical Shock and Vibration.
D.IEC 61000- 4-4; 4-5 Transient Suppression requirements.
E.FCC Title 47, Part 15, Class A, Electronic Noise requirements.
2.The post for the Pedestrian Push Button Post Assembly shall be aluminum Schedule 40.
3.Wiring for the Pedestrian Push Button Post Assembly shall conform to the manufacturer’s recommendations.
4.A #10 AWG (minimum) bare copper wire shall be used to connect the Pedestrian Push Button to the signal grounding system.
5.For signalized intersection crossings, the system shall have a programmable Extended Push Activation feature with the ability to extend the Walk time. Activation shall be programmable from one to six seconds.
g.Accessible Pedestrian Signals. The Accessible Pedestrian Signal (APS) shall be an audible vibro -tactile pedestrian signal system and shall consist of all electronic control equipment , mounting hardware, and push button, designed to provide both a push button with a raised, vibrating tactile arrow on the button as well as a variety of audible indications for differing pedestrian signal functions. 614.08 614-10 The integrated pedestrian push button shall be weatherproof, tamper -proof, constructed so that it will be impossible to receive any electrical shock under any weather condition, and operate on a voltage not to exceed 24 VAC. The housing shall be shaped to fit the curvature of the pole where it is attached to provide a rigid installation. Saddles shall be provided to make a neat fit when required. Materials for Pedestrian Push Button Post Assembly shall conform to the following:
1.The pedestrian push button post assembly, integrated push button, and sign shall meet the following requirements:
A.The latest version of the ADA Standards for Accessible Design, Chapter 3, Section 309 Operable Parts.
B.Current CDOT adopted Manual of Uniform Traffic Control Devices (MUTCD), Chapter 4E – Pedestrian Control Features.
C.NEMA TS 2 Section 2.1 requirements for Temperature and Humidity, Transient Voltage Protection and Mechanical Shock and Vibration.
D.IEC 61000- 4-4; 4-5 Transient Suppression requirements.
E.FCC Title 47, Part 15, Class A, Electronic Noise requirements.
F.The APS pushbutton enclosure shall meet the NEMA 250 – Type 4X enclosure requirement.
2.The post for the Pedestrian Push Button Post Assembly shall be aluminum, Schedule 40.
3.Wiring for the Pedestrian Push Button Assembly shall conform to the manufacturer’s recommendations.
4.A #10 AWG (minimum) bare copper wire shall be used to connect the Pedestrian Push Button Post Assembly to the signal grounding system.
5.For signalized intersection crossings, the system shall have a programmable Extended Push Activation feature with the ability to extend the Walk time and provide an informational audible message. Activation shall be programmable from one to six seconds. 614.08 614-11 The Accessible Pedestrian Signal (APS) shall have the following functional requirements:
1.APS functional features. The APS shall be programmable and adjustable. Programming and adjustments shall be made using a laptop computer, smart device, or vendor supplied programmer. No additional hardware or equipment shall be required. The APS shall be fully compatible with the three latest versions of the Windows operating platform. The programmable features shall be:
A.Push-button locator tone.
B.Walk and Wait audible message.
C.Audible push -button informational message.
D.Audible crossing beacon.
E.Vibrating, tactile arrow push button.
F.Independent minimum and maximum volume limits for the Locator Tone, Walk, and Audible Beaconing features. Audible features shall emanate from the pedestrian pushbutton housing. The APS shall utilize digital audio technology, having a minimum 12 -bit sample at a 16k Hz sample rate. Total harmonic distortion shall be less than 3 percent at 75 decibels. The APS sh all provide independent ambient sound adjustment for the Locator Tone feature. The APS shall allow for Locator Tone volume to be set below the ambient noise level. The system shall have a minimum of three programmable locator tones. All sound levels shall adjust automatically utilizing an internally mounted, interval ambient sensing microphone, per the MUTCD. For signalized intersection crossings, the APS shall monitor the Walk condition for conflict operation. As a standalone unit, the APS shall disable the Walk functionality should a conflict be detected. The APS system shall log cumulative call data. The data shall be date and time stamped and shall be accessible via laptop or smart device. For signalized intersection crossings, the system shall provide a programmable audible Wait message when the button is pushed. The message shall only annunciate once per actuation.
2.Power Control Unit (PCU). The PCU shall be mounted in the pedestrian signal head and shall be powered by the activation of Walk or Don’t Walk using 120 Volts Alternating Current (VAC). The PCU shall utilize separate power inputs for Walk and Don’t Walk. The PCU shall not require more than four wires from the PCU to the corresponding push button. 614.08 614-12 3. Push Button Assembly (PBA). The PBA shall be a single assembly containing an ADA compliant, vibro -tactile (signalized) directional arrow button, weatherproof audible speaker, and informational sign with optional placard braille messages. The PBA housing shall not incorporate any plastic or polycarbonate parts. The PBA tactile arrow shall be 2 inches in length and shall be field adjustable to two directions. The push button shall utilize Piezo switch technology rated at greater than twenty million operations. Vibro -tactile operation shall pulse at 20 Hz with a minimum 0.003 - inch displacement against a 2 -pound applied force. The PBA assembly shall be capable of mounting on a curved or flat surface utilizing either machine screws or bolts or banding type mounting hardware. The PBA shall accommodate mounting to a minimum 4 -inch diameter pole.
h.Traffic Signal Poles . All traffic signal poles, mast arms, concrete foundations, and necessary hardware shall conform to the appropriate requirements of Sections 601, 613, 713, and 715, these specifications, and the details shown on the plans. All traffic signal poles and mast arms shall be of like manufacture. Workmanship and finish shall be equal to the best general practice of metal fabrications shops. Pole shafts shall be straight, with a permissive variation not to exceed 1 inch measured at the midpoint of a 30- foot or longer pole and not to exceed 3/4 inch measured at the midpoint of a pole shorter than 30 feet. Plumbing the pole shall be accomplished by adjusting the nuts before the foundation is finished to final grade. Shims or other similar devices for plumbing or raking will be permitted only when approved. Span wire poles may be seamless or may be fabricated as one piece without transverse joints or welds and with only one longitudinal seam, which shall be continuously welded, and ground, or rolled flush.
i.Traffic Signal Faces. All pedestrian signal faces and all vehicle signal faces shall conform to the requirements of subsection 713.11, the plans, and the following: All vehicle signal faces shall be of the adjustable, vertical type with the number and type of sections detailed and as shown on the plans. They shall provide a light indication in one direction only and shall be adjustable through 360 degrees about a vertical axis. They shall be mounted at the location and in the manner shown on the plans. Unless otherwise shown on the plans, all signal faces shall be standard and shall contain three sections arranged vertically; red -top; yellow -center ; green -bottom. All vehicle signal faces shall be focused to allow maximum visibility to approaching motorists. All new faces installed, at any one intersection, shall be of the same make and type. 614.08 614-13 When specified on the plans, the optical units of all vehicle signal faces and all pedestrian signal faces shall be an LED Traffic Signal Section Optical Unit conforming to the requirements of subsection 713.11. The LED optical units shall be installed per the manufacturer's instructions.
j.Backplates. Where shown on the plans backplates shall be furnished and installed on signal faces. No background light shall show between the backplates and the signal face or between sections.
k.Programmed Visibility Vehicle Signal Faces. All programmed visibility vehicle signal faces shall conform to the requirements of subsection 713.11, the plans, and the following: Each programmed visibility signal section shall provide a nominal 12 -inch diameter circular or arrow indication. Color and arrow configuration shall conform to ANSI D -10.1. Each section shall be provided with a sun visor. Each signal section shall be provided 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 mountings. Terminal connection shall permit external adjustment about the mounting axis in five -degree increments. The signal shall be mountable with ordinary tools and capable of being serviced without tools. Adjustment shall be preset at four degrees below the horizontal, unless otherwise specified. Before programming, each signal section with a yellow indication shall provide a minimum luminous intensity of 3,000 candela on the optical axis, and a maximum intensity of 30 candela at 15 degrees horizontal from the axis. Each such signal section shall be capa ble of having its visibility programmed to achieve the following luminous intensities: a minimum of 3,000 candela on the optical axis, a maximum of 100 candela at from 1/2 to 2 degrees horizontal from the axis and a maximum of 10 candela at from 2 to 15 degrees horizontal from the axis. Under the same conditions, the intensities of the red indication and the green indication shall be at least 19 and 38 percent respectively of the yellow indication. The Contractor shall program the head as recommended by the manufacturer or as directed. The visibility of each programmed visibility signal face shall be capable of adjustment or programming within the face. When programmed, each signal face's indication shall be visible only in those areas or lanes to be controlled, except that during dusk and darkness a faint glow to each side will be permissible.
l.Traffic Signal Electrical Conductors and Control Cable. Conductors and cables shall conform to subsection 713.11. An 1/8-inch nylon rope shall be installed in all new conduit and all existing conduit where a cable is added or an existing cable is replaced. At least 2 feet of pull wire or rope shall be doubled back into the conduit at each termination. Signal light conductors shall conform to the Red -Yellow -Green color sequencing with different colored tracers for each phase provided. 614.08 614-14 Sufficient signal light conductors shall be provided to perform the functional operation of the signal system. Additional conductors for service, interconnect, etc. shall be provided as noted on the plans. A separate set of three spare conductors shall be provided from the controller cabinet to the base of each pole. Conductors shall be permanently identified as to function. Identification shall be placed on each conductor, or each group of conductors comprising a signal phase, in each pull box and near the end of terminated conductors. Identification shall be by bands fastened to the conductors in such a manner that they will not move along the conductors. Loop detector wire shall consist of specified loop wire encased in 1/4-inch OD, 3/16 -inch ID vinyl or polyethylene tubing. All inductive loop detector harness cables shall be shielded. All detector and pedestrian push -button circuits shall consist of separate two conductor wire systems. All signal light cable conductors shall have individual terminal lugs for connection to terminal strips. All detector lead -in cable shall consist of two No. 14 copper conductors with each conductor insulated with high molecular weight, heat -stabilized, colored polyethylene. The conductors shall be twisted, and the twisted pair shall be protected with a shield of tinned copper -brass or aluminum -polyester. A No. 16 minimum, stranded, tinned , copper ground drain wire shall be provided. The cable shall be provided with a chrome vinyl outer jacket with a minimum thickness of 37 mils, suitable for use in conduit or for direct burial when used in conjunction with magnetic or magnetometer detectors. Loop Detector Wire (Prefab) (Special) shall meet or exceed the following: The loop shall consist of No. 14 AWG wire and the minimum number of turns as specified in the plans. The conductors shall maintain their relative position to each other throughout the entire loop configuration. Twisting of the conductors within the loop configuration will not be permitted. The loop wires shall be installed in protective tubing constructed of a cross -linked polyethylene material or equivalent. The outside diameter shall not exceed 0.5 inches. The preformed loop shall be hermetically sealed at the tee and at the lead -in header to prevent the entrance of water. The loop lead- in wires from the preformed loop to the pull box shall be a twisted 14 AWG wire, with at least five turns for every three feet. Wiring shall be encased in the same cross- linked polyethylene tubing material or equivalent. Installation of preformed loops shall be per the manufacturer's recommendations. Before installation, the Contractor shall provide a paper copy of the installation procedures for the project. The preformed loops shall be manufactured to the dimensions shown on the plans and designed to be laid in place immediately before paving operations . 614.08 614-15 The Contractor shall determine the length of the loop lead in wires required from the preformed loop to the first pull box outside the roadway and shall furnish a copy of the lengths to the Engineer . Regardless of type, there shall be no splices in the pull box special. The loops shall be delivered to the project at least seven days before installation and placement. The Contractor shall check the continuity of the loops upon delivery to the project, once set on grade immediately before the paving operation, and after the paving operation. The Contractor shall check both continuity and resistance to ground the following day or as directed and shall record and submit the results.
m.Traffic Signal Vehicle Detector Amplifier.
1.General System Requirements. Vehicle detector amplifier shall consist of high performance, multiple channel inductive loop vehicle detector units and data acquisition software that can provide binned traffic data and real -time traffic measurements on a vehicle- by-vehicle basis. The system shall provide current measurements and vehicle detection information on the last vehicle for use in local control, incident detection and advanced traffic management systems. A communication link shall provide remote access to the detector for reading unit configuration settings, for fault identification and verification, for real -time system monitoring and data collection on up to four channels of detection. It shall include password security to the detector to change configuration settings. The communication link shall provide for party line communication on up to eight units using 4 -bit hardwired addresses to the card edge connector and 127 software programmable addresses in electronically erasable programmable read -only memory (EEPROM ) memory. The interface and data acquisition software shall be organized by application and facilitate setup, real -time traffic monitoring and collection of binned count and occupancy data. A vehicle log shall provide a means for logging of vehicle speed, vehicle length, loop -to-loop travel time , and detection duration. Optional modes of operation shall include a vehicle travel direction detection setup capability using overlapped 6 foot by 6-foot loops, a long -loop count mode to provide turning movement counts and a microloop mode selection when channels are connected to microloop sensors. The Contractor shall supply data acquisition and interface software and vehicle detectors that meet all the operational and functional performance requirements per the terms and conditions of this specification. The Contractor shall obtain the manufacturer’s standard warranty and surrender it to the Engineer .
2.General Hardware - Standards and Performance Requirements. The inductive loop detector units shall be fully interchangeable, whether used for system counting, occupancy measurement, speed and length measurement, directional detection, binned data collection, remote data acquisition in advanced traffic management s ystems or for local intersection control (including long -loop counting). 614.08 614-16 Detector configuration data shall be entered using special interface and data acquisition software. A communication interface shall provide for remote connection and configuration of detectors, real -time activity monitoring and data acquisition via modem to remote devices. Inductive loop detector units shall meet the latest edition of the National Electrical Manufacturers Association (NEMA) Standard TS2 -1992 for Type 2 controller and cabinet assemblies plus the functional and performance requirements of this specification. The detectors shall be configured as plug -in devices that meet the requirements for NEMA TS2 -1992 section 3.2, actuated Type 2 A2 operation and Type I Al operation in 44-pin input files. Detectors shall comply with NEMA TS2 -1992 Section 6.5.2.2.1, Table 6.5- 1 for four - channel rack mount type units, NEMA designation "D," except that Delay and Extension Timing shall be provided on all four channels in lieu of NEMA TS2 -1992 section 6.5.2.24 r equirements. Detectors shall also be suitable for use in California/New York TYPE 170/179 and ATC cabinets with 22 -pin input files. Detectors shall detect and hold the presence of all licensable motor vehicles (including small motorcycles). This shall be accomplished, without detecting traffic in the adjacent lane (beyond 3 feet from the loops except as noted below), on the following loop configurations with from 100 feet up to 1 ,000 feet of home -run cable. One to six series connected, 6 -foot-by-6-foot square loops with three turns of #14 AWG wire or with four turns of #14 AWG wire. A 6-foot-wide by 30 -foot-long loop with two or three turns of #14 AWG wire (when set to detect small motorcycles, may detect adjacent lane traffic). A 6-foot-wide by 20- foot to 60- foot-long quadruple loop with a winding of two -four- two turns of #14 AWG wire. When sensitivity is set to detect small motorcycles, adjacent lane traffic shall not be detected. Single, double and triple microloop probe sets. Each channel shall automatically self -tune with full sensitivity, to any loop and lead -in combination resulting in a total inductance of 20 to 2 ,500 micro henries with a Q factor of five or greater, within four seconds after application of power.
3.Special Features and Performance Requirements. Detectors shall be microprocessor controlled and be capable of being configured with manual switch settings and via software settings in EEPROM memory. Detectors shall include eight sensitivity settings (thresholds) in 2:1 steps. Threshold settings shall directly relate to nanohenries of inductance change ( ΔL). Each increase in Presence or Pulse mode settings shall double the sensitivity (reduce the thres hold) from the previous setting. The highest sensitivity (smallest change) setting shall have a ΔL threshold value of eight nanohenries while the lowest sensitivity setting shall have a ΔL threshold of 1024 nanohenries. 614.08 614-17 Each detector shall have a single, switched oscillator system to sequentially excite and measure each channel. Each detector shall have a three -position toggle switch to manually select one of three operating frequencies. These three frequencies shall also be software selectable. Each detector shall have two serial ports; a front panel RS232 port and transmit/receive pins on the card edge connector for serial communication. Each serial port shall have a multi -drop mode and be capable of party line communication with up to eight detectors on the party line. The detector unit shall be designed to accommodate the addition of either an optional plug-in memory module or a plug -in communication module. The communication module shall allow expansion of the multi -drop capability to 32 devices on a common serial port bus and convert the rear port into an independent port. With the optional module installed, communication with a PC through the front port sha ll not interfere with system communication on the rear serial port, and the baud rates shall be independently settable for the front and rear serial ports. Baud rates shall be selectable at 1200, 2400, 4800, 9600, or 19200 BPS using the interface software. The memory module shall expand the memory used for on -board count and occupancy binning. The front panel serial port shall have EIA -232 electrical characteristics and shall terminate with a front panel 6 -pin circular Mini- DIN connector. A communication cable with a DB -9 female connector (for a computer serial port connection) and a 6 -pin Mini -DIN male connector (for the front panel serial port connection) shall be provided for direct communication with a remote reporting device or a PC ru nning the interface and data acquisition software. Units shall have software settable addresses from 128 to 254. Address 255 shall be assigned as a “wildcard” to be used only when connected to the front panel port to establish connection and read the correct address from the device. Units shall have 4 -bit back panel hardwired addressing capability to allow selection of one of 16 hard -wired addresses. Backpanel addressing shall be enabled via the interface software. An external 24VDC Green control input shall be provided to control the output timing. If True (ground level = 0 to +8VDC), the Green input shall disable Delay and enable Extension Timing. If False (+16 to +30VDC or Open), the Green input shall disable Extension and enable Delay Timing. Software shall provide for an option to disable Green Gating so that Delay or Extension Timing is provided unconditionally. Detector units shall have a Presence or Pulse mode output option. Selection shall be via front panel switches or software settable options. 614.08 614-18 Each channel shall have a pushwheel sensitivity switch to enable manual selection of one of seven Presence mode or eight Pulse mode settings or an OFF position. Presence output shall hold vehicle detection for at least four minutes minimum for small, licensed motor vehicles (100 cc. motorcycles) and for at least 60 minutes for automobiles before tuning -out vehicles (dropping recognition of vehicle presence) over a 6 foot by 6- foot square loop with three or four turns of wire. The Presence output shall not tune out when vehicle motion exists (defined as vehicle entry and departures continue every few minutes and vehicles remain present in the sensing zone) for at le ast 60 minutes. In Fast Recovery mode, the channel shall recover to full sensitivity within 750 milliseconds after all vehicles leave the inductive loop sensing zone. Pulse mode shall provide a single, output pulse of 118 plus or minus 5 milliseconds in response to an 18 -foot-long vehicle traveling over a 6 foot by 6-foot loop at 8 mph, and for successive vehicles traveling over the same loop at speeds ranging from 10 to 100 mph, with a one -second headway. Pulse width shall be programmable from interface software. If a vehicle remains over the loop, further detection shall be inhibited for a 1.9-second rephase delay and then full sensitivity shall return immediately regardless of continued presence of the vehicle. Pulse rephase shall be programmable from interface software. Detector units shall have optically -isolated Field-Effect Transistor ( FET) outputs to provide fail -safe solid-state operation. The field -effect transistor (FET) is a type of transistor that uses an electric field to control the flow of current in a semiconductor. FETs are devices with three terminals: source, gate, and drain. Loop detector channels shall continue to function with a single point short to ground on the loop/lead -in system. Each channel shall be capable of detecting and displaying current and historical faults (a short to ground, an open circuit or an inductance change P 25 percent) in the inductive loop or lead -in system. Each channel shall have two LED indicator lights on the front panel: a green “Detect” LED and a red “Fault” LED. The green “Detect” indicator shall indicate detection output status and output timing in process. The green “Detect” indicator shall indicate an Extend flash while the call output is actuated following a directional detection unless fail -safe for a particular condition is disabled using the interface software. The green “Detect” indicator shall flash during Delay and Extension Timing to provide a visual indication of timed output. Delay and Extension flash rates shall differ by at least four times the other’s rate. Delay shall be four flashes per second and Extension shall be 16 flashes per second. The green “Detect” indicator shall be ON continuously during a fault condition. During a fault condition on a channel, the channel shall display a continuous call indication on its green “Detect” LED and generate a continuous, fail -safe output on the prima ry output, regardless of the pulse or presence operating mode selected. 614.08 614-19 A status output shall provide a serial coded message to external devices (controllers) that are capable of using the serial information per NEMA conventions described in TS2 -1992. A red "Fault" LED shall indicate current or historical channel fault condition (status) and type. The Fault indicator shall flash a coded message during an open loop condition, a shorted loop system condition and a ≥ 25 percent change of inductance conditi on. The associated channel's red “Fault” LED shall provide visual indication of fault type and current or historical status with a unique flash code. A fault indication shall be enabled for as long as the fault remains, except by turning the channel OFF in software or by selecting the “X” setting on the sensitivity switch. If the fault heals or is corrected, the affected channel shall immediately retune and be capable of normal detection. The visual fault indication shall remain active until reset by a momentary change in the mode or sensitivity setting, a momentary interrup tion of power or by pressing a reset switch. Primary output of each detector channel shall provide accurate detect duration in response to an automobile over a three or four turn 6 -foot by 6 -foot square inductive loop to enable accurate speed, length and occupancy measurements by external devices. The detector channel, with a 100- microhenry loop/lead- in attached to each channel, shall for any negative inductive change that exceeds its sensitivity threshold generate a ground true logic level output response within 13 milliseconds for a sensitivity sett ing of 128 nanohenries and within 20 milliseconds for a sensitivity setting of 64 nanohenries. Loop detectors shall have a multi -position switch to reset all channels and to provide Normal and Fast Recovery modes of operation. The Fast Recovery setting shall cause the detector to adapt instantly to large changes of apparent inductance in the non- call direction. The Normal Reco very mode shall cause the detector to adapt, at a default rate of 0.5 thresholds per second, to apparent changes of inductance in both directions. Loop detectors shall have a Remote Reset input pin on the card edge connector. The unit shall reset and establish a new reference for each loop that is turned ON, when voltage on Pin C is less than 8 volts DC for a period of greater than 17 milliseconds. Delay Timing shall be adjustable from zero to 31 seconds, minimum, in increments of 1.0 seconds in lieu of NEMA TS2 -1992 section 6.5.2.24.1 increments. Delay timing shall occur if the green input is false. Extension Timing shall be adjustable from zero to 7.75 seconds, minimum, in increments of 0.25 seconds in lieu of NEMA TS2 -1992 section 6.5.2.24.2 increments. Extension timing shall occur if the green input is true. Each channel shall be capable of being configured for Long -loop Count mode for counting each individual vehicle moving onto or over a single inductive loop that has a length greater than 20 feet, regardless of previous vehicles being stationary on, moving over or leaving the detection zone. The call output in the Long -loop Count mode shall be a presence output. The configuration of the channel and the retrieval o f the long loop count shall be accomplished via the serial ports using the software. 614.08 614-20 Two channels (channels 1 and 2 or 3 and 4) shall be capable of being assigned to directional detection mode for detecting the direction of travel of a vehicle over two overlapping 6-foot by 6 -foot loops with leading -edge-to-leading -edge spacing of 3 feet. A call output shall be generated and stored as a directional count by the second channel that detects the vehicle in the direction of the vehicle's travel. The configuration of the detector for directional detection and the retrieval of the directional cou nt shall be accomplished via the serial ports using the software. Each channel of the vehicle detector shall be capable of collecting and storing counts and occupancy in time bins. The detector memory shall allow storing count and occupancy in 15 -minute time bins for a duration of 36 hours and with the optional memory mo dule for a duration of 335 hours. The configuration of the time bin intervals and the retrieval of the stored counts and occupancy shall be accomplished via the serial ports using the software.
4.Interface Software Requirements. The detector unit shall be capable of remote configuration, system diagnostic measurements and real- time data collection. A communication link shall provide remote access to the detector for reading its configuration, for fault identification and verificat ion, for real -time monitoring and data collection on up to four channels. The link shall provide optional password protection to change unit configuration settings. Interface software shall display and report current loop inductance measurements, current o r last (historical) fault information, and information specific to the last vehicle detected and vehicle counts. Vehicle information shall include vehicle change of inductance, speed, length and time over loop. A Windows ™ based interface and data acquisition software program shall be provided to perform these functions via a remote reporting device running under a Windows operating system compatible with the Region’s existing signal operating system software. The software shall establish and maintain the communication link to a remote reporting device via a field modem or by direct connection to one of the serial ports on the detector. The software shall be organized by application to simplify setup and monitoring of channel activity measurements, traffic counting, long -loop count, logging of vehicle speed and vehicle length, loop to loop travel time, detect duration, binning of count and occupancy, and sensing of vehicle travel direction with directional detection and call duration. The software shall allow selection of the PC's communication port and baud rate. The software shall include a phone book and dialing utility. The interface and data acquisition software shall provide a Read from Device command on the File menu. The Read from Device shall allow the selection of an address to establish remote communication with a detector unit. The initial screen shall open with a Settings icon, a Real -Time Vehicle Logging icon and a Traffic Data Binning icon. After communications have been established with a detector, other icons shall appear. These shall include the Real -Time Activity Monitorin g icon, Force ALL Outputs and LEDs icon, a Reset icon and a Scan- Time Utility icon. 614.08 614-21 A Settings window shall be divided into nine tabs to organize the settings by application. A General tab shall allow selection of the configuration source to be either from EEPROM or switches, the oscillator frequency for the unit, the vehicle count period and channel sensitivity and mode. A Communications tab shall provide for the setting of a field modem command string, transmit delay, selection of the communication baud rates on the front and rear ports, for setting a programmable address and to enable a backpanel address. There shall be provisions to establish, cancel and change a password. If password protection is set up in a detector , the unit shall not respond to any requests to perform a reset or change settings until the correct password has been issued. After a verified password has been issued, the detector shall respond to all requests for reset or settings changes for 60 minutes. After 60 minutes, the unit shall revert to password - protected mode until the password has been issued. Reset shall cause immediate reinstatement of password protection. A Timing tab shall provide for setting the Delay or Extend Time options and the timing increments for each channel. There shall be an option to select “Enable” Green Gating to condition the timing functions to green inputs. A Microloop tab shall provide for selecting microloop mode of operation and setting some of the parameters that are unique to the performance of microloop sensors in special applications. A Long Loop tab shall provide for selecting the option to count vehicles over long loops set to operate in Presence mode. Setup options shall be included to allow for calibrating the algorithm to improve count accuracy on loops 20 to 60 feet long. Vehicle counts shall be available over the serial communication ports. A Directional tab shall provide the option of setting up travel direction sensing on channel pairs 1 and 2 and 3 and 4. With the paired channels connected to 6 -foot-by-6-foot loops that are overlapped by 3 feet, vehicles shall be counted in both directions. The directional detection call output shall be assigned to the last loop a vehicle crosses when traveling in the direction that is to be detected. Call Duration shall b e selectable for the directional output on the trailing channel of the paired sets. An Output tab shall provide for the option to enable the Status Output for NEMA TS2 Type controllers. Software provision shall also exist to disable the “fail- safe” Call Output. A Noise Immunity tab shall provide for selecting several noise options including a power line filter that can be enabled. An Adapt tab shall provide for selecting the adaptation parameters for the detector unit to modify default operation. 614.08 614-22 A Real -Time Vehicle Logging icon shall provide for setting up channels to monitor vehicle speed and length measurements. Facilities shall be provided to insert a loop description (ID label), a loop type (configuration) and a calibration utility to select effective magnetic field loop sizes to improve measurement accuracy. The utility shall also provide for setting up loop assignments and leading -edge distances from loop to loop to calculate vehicle speeds. Facilities shall be included to activate and view t he log with channel ID, loop descriptions, dates, times, speeds, lengths, durations, loop-to-loop times displayed in real -time. Provisions shall be made to save the log to a file and print the log. A Traffic Data Binning icon shall open a window to setup and collect binned count and occupancy data from the detector. A tab shall provide for setting up the channels to be binned, the start date and time, the end date and time and the binning intervals. Software shall be included to inform the user when the detector will run out of memory based on the setup information provided. If continuous binning is selected the data shall “wrap -around” so that the oldest data will be overwritten with the latest entri es. A Real -Time Activity window shall be provided to display all current detection information pertaining to each channel, including current measurements (loop inductance, loop frequency, reference frequency, green input state and loop status), last fault (or historical fault) information (fault type, time and date), plus information specific to the last vehicle detected (DL in nanohenries, detect duration, detect time, and detect date) and traffic counts (count, directional count and the count period remaining ). The Activity window shall include a freeze capability to capture the current activity information while the unit continues to display the most recent changes. A window shall be included to verify the operation of a detector’s outputs and LEDs and confirm the wiring of a control cabinet to issue the call output to a device or controller. This utility shall allow selection of specific Detect LEDs, Call Outputs, Fa ult LEDs, and channel Status Outputs to be “forced” ON or OFF for testing the system. A window shall be included to remotely reset a detector. It shall be possible to select specific channels, all channels or the entire unit. A window shall be included to provide a real -time view of the detector's self - measured scan -time. This interactive utility shall continuously read and display the detector’s scan -time and display the theoretical detection performance based on user-selectab le parameters. The software shall allow printing of settings, activity measurements, and binned and logged vehicle data. A comprehensive ON -LINE Help utility shall be included with detailed descriptions of unit features and setup information. The Help text shall include hyperlinks to all subjects related to applications or setup sequences. Help screens shall include a print function to print the page. 614.09 614-23 CONSTRUCTION REQUIREMENTS
614.09 Highway Signs and Traffic Signals . Aluminum shall be heliarc welded and conform to
the AWS requirements for welding aluminum. Portions to be welded shall be cleaned and prepared to assure 100 percent penetration butt weld. Oxygen cutting will not be permitted. Preheating, if used, shall n ot exceed 400 °F for 30 minutes. Defective welds shall be removed and rewelded. Acceptable aluminum welds shall be per AWS with 17 ksi the minimum tensile strength for reduced section specimens. Welding and fabrication of Traffic Control Devices shall conform to ANSI/AWS D1.1, as amended. Fillet welds connecting tubular steel to a shape or plate shall be qualified per ANSI/AWS D1.1, section 4.11.1. The fillet weld Procedure Qualification Record (PQR), all Welding Procedure Specifications (WPSs) and Welder Qualification Records (WQRs), Inspection, and Nondestructive Testing Reports shall be submitted to the CDOT Staff Bridge Fabrication Inspectors, 4201 East Arkansas Avenue, Denver, CO 80222 for approval before fabrication. CDOT acceptance of submitted PQRs, WPSs, and WQRs establishes prequalification to fabricate Traffic Control Devices. All ungusseted traffic signal mast to pole bracket, pole bracket to pole, and pole to base plate attachment welds shall conform to ANSI/AWS D1.1, Section 2.36.6.6. Before welding, base metal surfaces shall be blasted or ground to eliminate mill scale, visible rust, oil, or debris. Welding shall be performed before galvanizing, metallizing, or application of zinc coatings to the piece. The fabricator shall submit a Written Practice for the Administration of Personnel Qualification and Certification Program per the American Society for Nondestructive Testing (ASNT) SNT -TC-1A for approval. Personnel performing the weld evaluations shall be certified as ASNT Level I or II. Certification of Level I and Level II individuals shall be performed by a Level III individu al who has been certified by (1) The American Society for Non -destructive Testing, or (2) has the education, training, experience, and has successfully passed the written examination prescribed in SNT -TC-1A. All welds shall be visually inspected by the fabricator. All welds shall meet the acceptance criteria specified in ANSI/AWS D1.1, Table 6.1, Tubular Connections (All Loads). The arm simplex plate, pole simplex plate to gusset, gusset to pole, pole to base plate, and all sign bridge beam to pole clamp welds shall be magnetic particle tested (MT). The alternating current (ac) yoke method shall be performed. The yoke spacing shal l be 4 inches. The yoke shall be calibrated each day per ASTM E709. Daily calibration records shall be maintained and made available for review upon request. The acceptance criteria shall be as specified in ANSI/AWS D1.1, Table 6.1, Tubular Connections (A ll Loads). Structural steel shall be galvanized per ASTM A123. Pole hardware shall be galvanized per ASTM A153. All signs must be clean before erection. Installation shall be of such sequence as to result in maximum traffic safety. Signs shall be erected in conformity with the plans. Before final positioning, the sign shall be inspected at night by the Engineer and adjustments will be made, if necessary, to eliminate specular reflection. 614.09 614-24 Footings for ground signs and overhead sign structures shall be per the Contract. The tops of drilled caissons used for overhead sign structure footings shall be formed to at least 6 inches below ground line per Section 601. Timber signposts shall be set in drilled or excavated holes and tamped firm and plumb. U -2 posts and steel tubing posts may be driven plumb or set in the same manner as timber posts. The sequence of erection of new and reset sign installations shall be correlated with the removal of the existing traffic controls. The decision regarding the sequence shall be worked out with the Engineer before starting the work. Longitudinal and lateral adjustments of sign locations to fit field conditions shall be as directed. Electrical service for all sign illumination shall consist of all the electrical circuitry necessary from the power source to the switch box at the structure. This includes grounding, fusing, direct burial cable or conductor in conduit. Electrical service shall be 110 to 115- volt AC, 15 amp., fused circuit, and shall be installed underground unless otherwise shown on the plans or permitted. Electrical work, including photoelectric control, shall conform to Section 613 and to the details shown on the plans. Mask sign legend shall consist of providing a separate removable aluminum panel at least 0.040 inches thick and of sufficient dimensions to completely mask the legend. This panel shall be furnished with retro -reflective sheeting conforming to Section 713 and shall be the same color as the background of the sign. Panels shall be securely fastened to the main panel by mechanical means using a minimum number of fasteners. Adhesives, glues or tapes shall not be used. Modifications shall be as follows:
1.Steel Signposts . This work shall consist of providing breakaway devices as shown on the plans for existing steel posts and shall include shortening and repainting the posts.
2.Timber Signposts . This work shall consist of providing breakaway devices as shown on the plans for existing 6 -inch-by-6-inch timber posts.
3.Sign Legend. This work shall consist of modifying the legend on existing signs as shown on the plans and shall include all work necessary to remove and re- space existing legend; to furnish and install new legend and border as required.
4.Tubular Steel Sign Supports. Tubular steel signpost , slipbase or socket and wedge, footing, and mounting clamps shall be installed per Standard Plan S -614-8 and the manufacturer's recommendations. The Contractor shall make all arrangements to have a manufacturer - trained installer of the manufacturer's products on- site during the construction of the entire assembly and associated signs t o ensure proper installation. Before the placement of the posts, the Contractor shall submit to the Engineer , written documentation of the installer's qualifications and training in the construction of tubular steel sign supports. Upon completion of installation, the Contractor shall obtain and submit documentation from the trained installer that the installatio n of the signposts was per the manufacturer's recommendations. The flashing beacon shall be installed as shown on the plans. The solar power system shall be placed outside the clear zone of the roadway or behind guardrail. Batteries shall be placed in a lockable container attached to a supplemental pole supporting the solar panels that is installed outside the clear zone, or behind guardrail. 614.10 614-25 Before start of the installation of a n APS, the Contractor shall submit all units for testing. Installation of the APS shall not begin until written approval of each unit has been received from the Engineer . If a unit fails to pass testing, the Contractor shall repair or replace the unit at their expense.
614.10 Traffic Signal Systems - Construction .
a.General. The Contractor shall submit an as -constructed plan, showing in detail all construction changes including wiring, cabling, locations and depth of conduit. The as- constructed plan shall include a sketch identifying the cables by numbers and a code describing the function and color of each conductor contained within the cables.
b.Traffic Signal Electrical Conductors and Control Cable. All cables and conductors not shown on the plans as aerial cable or embedded loop detector shall be installed in conduit unless installed in poles, pedestals or mast arms. Each mast arm mounted signal face shall be wired separately back to the pole base. The signal face position farthest from the pole shall be wired from the face to the controller to accept a five- section left -turn signal face, whether such a signal face is called for or not. Aerial cable shall be installed where specified on the plans and secured to messenger cable with rings. Self -supported cable shall not be installed unless that cable is specifically designed for this purpose. Drip loops shall be provided on all conductors where they enter pole weatherheads or signal heads. Wiring and splices shall conform to NEC practices. Wiring within cabinets, junction boxes, etc., shall be neatly arranged and within cabinets shall be laced. Splicing of cable will not be permitted in the conduit or outside of pull boxes, standards, or pedestals at the handhole locations. Powdered soapstone, talc, or other approved lubricant shall be used in placing conductors in conduit. When splices are made, soldered splices or approved solderless connectors shall be individually taped with an approved polyvinyl chloride tape with a rubber -based pressure sensitive adhesive. The outside sheath shall be replaced by a minimum of two layers of this approved tape. Shellac compounds shall not be used. All overhead splices shall be “T -tapped” and either soldered or connected by an approved copper compression ring. If a compression ring connector is used, the ring shall be applied by a ratchet tool, which will not release until the proper crimping force is applied to the connector. All splices in detector sensing circuits shall be soldered and taped to exclude moisture. All splices done in cables containing solid wire shall be soldered. Splices in underground systems shall be waterproofed. All underground splices shall be capable of satisfactory operation under continuous submersion in water. 614.10 614-26 Conductors between detectors and the controller cabinet shall not be contained in the same cable with any other signal control circuits but may be carried in the same duct or conduit as other signal circuits with not more than one splice in each detector sensing circuit. At least 5 feet of slack shall be left for each conductor at each support pole and at least 3 feet of slack at each pull box containing cable connections. A minimum of 6 inches of slack shall be left at each splice except within handholes where 12 inches shall be left. When conductors and cables are pulled into the conduit, ends of all these conductors and cables shall be taped to exclude moisture and shall be so kept until the splices are made or terminal appliances attached. Ends of spare conductors shall be taped. Multi-conductor cables shall be spliced and insulated to provide a watertight joint and to prevent absorption of moisture by the cable.
c.Bonding and Grounding . Metallic cable sheaths, conduit, metal poles and pedestals shall be made mechanically and electrically secure to form a continuous system and shall be effectively grounded. Bonding and grounding jumpers shall be a #6 AWG bare copper wire or copper strap of the same cross- sectional area. Sheath for detectors shall be grounded in control cabinet only. The other end of the sheath shall be taped and left ungrounded. A ground electrode shall be installed at each pole, pedestal, and control box. Each ground electrode shall be one- piece copper -weld rod of 5/8 inch diameter and 8 feet in length, driven to a depth of at least 8 feet below the surface of the ground. Bonding of poles and pedestals shall be by means of connecting to the ground rod a bonding strap attached to an anchor bolt or a 3/16 -inch diameter or larger brass or bronze bolt installed in the lower portion of the shaft.
d.Excavation and Backfilling. Excavation and backfilling shall be performed per the requirements of Section 206 and to the following: All excavation and backfilling shall be made before other improvements are completed so as to not require the repair or replacement of new sidewalks, pavement or landscaping. Excavation for the installation of conduit, foundations and other appurtenances shall be performed in such a manner as to cause the least possible damage to the streets, sidewalks, landscaping and other improvements. The trenches shall not be excavated wider than necessary for the proper installation of the electrical appurtenances and foundations. Excavation shall not be performed until immediately before installation of conduit and other appurtenances. The material from the excavation shall be placed in a position that will not cause damage or obstruction to vehicular and pedestrian traffic or interfere with surface drainage. Excavations, after backfilling, shall be kept well filled and maintained in a smooth and well-drained condition until permanent repairs are made. Excavations in the street or highway shall be performed in such a manner that not more than one lane of traffic in each direction is restricted at any time unless otherwise approved by the Engineer or in the special provisions. 614.10 614-27 Improvements such as sidewalks, curbs, gutters, portland cement concrete and asphalt concrete pavement, underlying material, lawns and plants, and any other improvements removed, broken or damaged by the Contractor 's operations , shall be replaced or reconstructed at the Contractor's expense with the same kind of material as found on the work or with materials of equal quality.
e.Foundations. All foundations shall be portland cement concrete conforming to the applicable requirements of Section 601. The bottom of concrete foundations shall rest on firm ground. Foundations shall be poured monolithically where practicable. For poles and pedestals, the top 2 inches shall be poured after the pole or pedestal is in proper position. The exposed portions shall be formed to present a neat appearance. Forms shall be true to line and grade. Tops of foundations except as noted on the plans, shall be finished to curb or sidewalk grade or as ordered. Forms shall be rigid and securely braced in place. Conduit ends and anchor bolts shall be placed in proper p osition and to proper height and shall be held in place by means of a template until the concrete sets. Both forms and ground that will be in contact with the concrete shall be thoroughly moistened before placing concrete. Where obstructions prevent construction of a planned foundation, the Contractor shall construct an effective foundation as directed. Strain and mast arm poles shall be installed with the proper rake as recommended by the manufacturer of the poles so as to assure a substantially vertical set when the specified signal and lighting equipment is installed.
f.Loop Detector Installation. Loop detectors shall be installed in the configuration shown on the plans. A complete installation consists of a conductor loop or group of loops installed in a saw cut in the roadway, lead -in cable and a sensor unit with power supply installed in a traffic signal controller cabinet. The saw cut shall be made 3/8 inch wide and a minimum of 3 inches deep. The slot shall be as straight as possible and shall not vary more than 1/2 inch when checked with a 10 -foot straightedge. Saw cuts shall be hydroblasted with a mixture of water and air and then blown free of water and debris with compressed air only. The cuts shall be as dry as possible before placement of wire. All corners shall be rounded to full depth as directed to prevent angle bends in the loop wire. After saw cut is cleaned of debris, the wire shall be placed for the loop by pushing it into the slot with a blunt non- metallic object. A screwdriver or other sharp tool shall not be used. Care shall be used to avoid abrading or damaging the insulation. After the loops are properly seated and tested for continuity and proper loop inductance, the slots shall be filled with an approved two -part self -curing , self -bonding weatherproof epoxy, or an approved alternative material. 614.10 614-28 One continuous length of wire shall be used for each loop from the signal base or pull box around the loop with the specified number of turns and back to the signal base or pull box. Detector lead -in pairs shall be symmetrically twisted, five turns per 1 f oot. Two-inch conduit shall be placed under the curb and into a signal base or pull box to accommodate detector loop wires. Conduit may be “pushed” or trench -laid, depending on conditions at project site and upon approval from the Engineer . Conductors of all loops to be operated by each sensor unit shall be run continuously to the nearest signal base or pull box. The loops shall be joined in the signal base or pull box in combination of series and parallel as shown on the plans so that optimu m sensitivity is obtained at the sensor unit. Final splices between loops and lead -in cable shall not be made until the operation of the loops under actual traffic conditions is approved by the Engineer . The loop detector wires shall be spliced to the shielded lead -in cable in the signal base or pull box and then pulled into the controller cabinet via the shortest possible distance using other existing conduit or messenger cable. A minimum of 3 feet of slack shall be provided in the controller cabinet for attachment to the detector amplifier. Each detector cab le shall be clearly labeled in the control cabinet identifying phase relationship and approach leg.
g.Magnetic Detector Installation. Magnetic detector sensing elements shall be installed within 3 inch, UL approved, Schedule 40 PVC conduit, as directed. Conduit shall extend across the traveled way as shown on the plans. Bottom of conduit shall be placed 12 inches below top of pavement.
h.Painting. All paint shall conform to Section 708. The painting of all electrical equipment requiring paint shall be done per Section 509. The painting of all electrical equipment specified to be painted may be required at any time as directed. All metal parts of poles, pedestals, standards, and fittings shall be cleaned of all rust, scale, grease, and dirt before applying paint. If an approved prime coat has been applied by the manufacturer and it is in good condition, an application of primer by the Contractor , other than for repairs, will not be required. All exterior surfaces shall be examined for damaged paint and all such damage shall be given a spot coat of primer and the entire exterior surface repainted. Factory finish on new equipment . will be acceptable if of proper color and if equal in quality to the specified finish. Paint shall not be applied to aluminum controller cabinets or to aluminum or galvanized poles, pedestals, standards, hardware, conduit, etc. unless specified. All steel poles shall be galvanized , unless otherwise shown on the plans. Controller cabinets (including inside door surface) shall be wire brushed or sanded to reduce reflectivity. All paint coats may be applied either by hand brushing or by approved spraying machine in the hands of skilled operators. The work shall be done in a neat and skillful manner. The Engineer . reserves the right to require the use of brushes for the application of paint should the work done by the paint -spraying machine prove unsatisfactory or objectionable as determined by the Engineer. Conduit and conduit fittings above ground shall be given one coat of primer and one coat of enamel conforming to the color of the adjacent standard or pedestal. 614.10 614-29 (i) Maintaining Existing and Temporary Electrical Systems. The existing traffic signals shall be kept in effective operation for the benefit of the traveling public. Where power to all signals must be turned off, the Contractor shall provide an off- duty police officer or other qualified person to direct traffic during the period the signals are off. The local traffic enforcement agency shall be notified before any operational shutdown of a traffic signal. The above does not apply to intersections that are completely closed to all traffic due to construction. The Contractor shall maintain at all times a minimum of two, three -section (red, yellow, green) traffic signal heads for each approach. If temporary signals are necessary to maintain the minimum signal display, the Contractor shall be responsible for furnishing all mate rials, equipment, tools, and labor necessary to install and maintain the temporary signals. The State or local agency will continue operation and maintenance of existing electrical facilities. The State or local agency will furnish electrical energy for operation and will repair or replace facilities damaged by public traffic. Where damage is caused by the Contractor's operations, the Contractor shall, at his expense, repair or replace damaged facilities promptly per these specifications. Signal faces that are installed before turning on shall be covered or directed away from traffic to clearly indicate that the signal is not in operation.
1.Field Tests and Turn On. Before completion of the work, the Contractor shall make the following tests on all traffic signal circuits in the presence of the Engineer . Each circuit shall be tested for continuity.
2.Each circuit shall be tested for grounds.
3.An insulation resistance test shall be made on each circuit between the circuit and a ground. The insulation resistance shall not be less than the values specified in the provisions of the NEC.
4.A functional test shall be made where it is demonstrated that each part of the system functions as specified or intended. The functional test for each traffic signal system shall consist of at least five days of continuous satisfactory operation. If unsatisfactory performance of the system develops, the condition shall be corrected, and the test shall be repeated until the five days of continuous, satisfactory operation is obtained. Functional tests shall start on any workday except Friday, or the day preceding a legal holiday. Turn on of new or modified signal systems shall be made only after all traffic signal circuits have been thoroughly tested as specified. The initial turn -on shall be made between 9:00 A.M. and 2:00 P .M. unless specified otherwise. Before turn-on, all equipment as shown on the plans shall be installed and operable. This includes pedestrian signals, pedestrian push buttons and vehicle detectors. 614.11 614-30 All louvers, hoods and signal heads shall be directed to provide maximum visibility. During the test period, the State or local agency will provide the electrical energy and repair any damage caused by public traffic. All other maintenance will be the responsibility of the Contractor. All systems shall be complete and in operation to the satisfaction of the Engineer. A field test of a single APS shall be performed in the presence of the Engineer. All repairs or replacements required to ensure a fully operational system shall be at the Contractor’s expense. The APS shall be installed per the manufacturer’s recommendations.
614.11 Barricades . Construction shall conform to the requirements of Section 508.
614.12 Rumble Strips. Rumble strips shall conform to the details and locations shown on
the plans. METHOD OF MEASUREMENT
614.13 Overhead sign structures (Sign Bridge Structures, Butterfly Structures, Sign Bridge
Cantilever Structures and Cantilever Structures) will be measured by the number of units of the various types and sizes installed and shall include structural frame members, mounting brackets, pos ts, excavation and backfill, and when called for on the plans, safety walkways and light fixtures including all electrical equipment as required. Drilled caissons used for overhead sign structure footings will be measured and paid for per Section 503. Installing only of sign structures will be measured by the number of units installed and shall include all hauling, concrete footings, removing existing sign panels, respacing and adding walkway brackets, adding walkways, repainting, excavation and backfil l and furnishing and installing light fixtures including all electrical equipment as required. Overpass mounted sign brackets will be measured by the number furnished and installed and shall include all structural members required to install sign panels on overpass structures as shown on the plans and all light fixtures including all electrical equipment as required. Sign panels shall be furnished and installed under the appropriate item. Ground signs will be measured as follows: Concrete footings by the number used, signposts by the length in linear feet of the various types used, and sign panels by the square feet of facing. For signs other than rectangular or triangular shape, the area in square feet will be computed from dimensions of the smallest rectangular shape that a panel can be fabricated. Sign panels shall include all mounting and backing angles required. Mask sign legend will be measured by the actual number of signs masked and shall include panel, reflective sheeting, and fastening the panel to the sign. Steel signpost extensions, if required, will be measured and paid for as “Steel Signpost ” of the type shown on the plans. Sign panels shall include background, message, backing zees (Classes 2 and 3), date of manufacture, and all necessary hardware. 614.13 614-31 Multi-directional break -away assemblies will not be measured and paid for separately but will be paid for under the appropriate item: all brackets, nuts, bolts, shims, hinge plates, and couplings will be paid for as Steel Sign post of the appropriate size; anchors and concrete footings will be paid for as Concrete Footing of the appropriate size. Steel Sign Support (Post) will be measured by the actual number of linear feet of posts (not to include length of T -brackets or U -brackets) that are installed and accepted. T -brackets, U - brackets, wedges and mounting clamps that are required to complete th e assembly as shown on the plans will not be measured and paid for separately but shall be included in the work. Steel Sign Support (Socket) will be measured by the actual number of sockets that are installed and accepted. Concrete footing will not be measured and paid for separately but shall be included in the work. When called for on the plans, signposts, sockets and footings, wedges and mounting clamps will be regarded as a single assembly and will be measured by the actual number of Steel Sign Support (Post and Socket) that are installed and accepted. Steel Sign Support (Slipbase) will be measured by the actual number that are installed and accepted. Concrete footing will not be measured and paid for separately but shall be included in the work. When called for on the plans, signpost , slipbase and footing will be regarded as a single assembly and will be measured by the actual number of Steel Sign Supports (Post and Slipbase) that are installed and accepted. Light fixtures shall include lamps, switch boxes, photoelectric controls, electrical conduit, electrical conduit in foundations, and all necessary wiring in the structure only. Illuminated signs will be measured by the actual number installed including switch box, footing, electrical conduit in the footing, post, and shall also include the wiring from the light to the switch box. Barricades will be measured by the number used. Flashing beacon will be measured as a unit complete in place (including sign panel) and shall include all work necessary to complete the item. Solar power system for flashing beacons, poles, and lockable container will not be measured and paid for separately but shall be included in the work. Traffic signal poles shall include mast arms and all necessary hardware required to complete the item in place. Drilled caissons used as foundations for traffic signal poles will be measured and paid for per Section 503. Cabinets shall include pedestals and concrete foundations as required. Span wire poles shall include span wire cable, jaw deadends, cable rings, concrete footings and all necessary hardware. Pole height shall be as indicated on the plans. Traffic signal controllers (Type 170E) shall include the cabinet, pedestrian detectors, and all auxiliary equipment required on the plans and shall include all work necessary to provide and install a complete system. 614.13 614-32 Loop detector wire will be measured by the linear foot and shall include loop wire, pavement sawing, slot sealant, and lead-in conduit as shown on the plans, excavation, backfill, and all other work necessary to complete the item. Preformed loop systems will be measured as the actual length in linear feet of the sealed continuous loop system that is run to the first pull box, regardless of type, and accepted. Traffic signal magnetic detectors shall include all shielded lead -in wire and non -metallic conduit housing and all wiring necessary for the operation of the system. Traffic signal loop detector amplifiers will be measured by the number of two channel units or four channel units and shall include all incidental materials and wiring necessary for the operation of the item. Pedestrian push button post assembly will be measured by the actual number that are installed and accepted and shall include all work and materials required to complete the item. Accessible Pedestrian Signals will be measured by the actual number that are installed and accepted. All costs for making electrical service connections from the power source to the service switch will be paid for per subsection 109.04. Rumble strips will be measured by the actual number of linear feet that are placed and accepted adjacent to or on the roadway surface, excluding gaps. Measurement of length for payment will be parallel to the roadway centerline or shoulder stripe. Pedestrian Push Button will be measured by the actual number that are installed and accepted. 614.14 614-33 BASIS OF PAYMENT
614.14 The accepted quantities will be paid for at the contract price per unit of measurement
for each of the pay items listed below that appear in the bid schedule. Payment will be made under: Pay Item Pay Unit Monotube Overhead Sign Cantilever (size) Each Monotube Overhead Sign Bridge (size) Each Monotube Overhead Sign Bridge with Cantilever (size) Each Sign Bridge Structure (Install Only) Each Overpass Mounted Sign Bracket Each Concrete Footing (_______) Each Steel Signpost (_______) Linear Foot Timber Signpost (_______) Linear Foot Steel Sign Support (2 -Inch Round) (Post) Linear Foot Steel Sign Support (2 -Inch Round) (Socket) Each Steel Sign Support (2 -Inch Round) (Post and Socket) Each Steel Sign Support (2 -1/2 Inch Round NP -40) (Post) Linear Foot Steel Sign Support (2 -1/2 Inch Round NP -40) (Slipbase) Each Steel Sign Support (2 -1/2 Inch Round NP -40) (Post and Slipbase) Each Steel Sign Support (2 -1/2 Inch Round Sch 80) (Post) Linear Foot Steel Sign Support (2 -1/2 Inch Round Sch 80) (Slipbase) Each Steel Sign Support (2 -1/2 Inch Round Sch 80) (Post and Slipbase) Each Sign Panel (Class) Square Foot Mask Sign Legend Each Illuminated Sign Each Barricade (Type _____) Each Flashing Beacon Each Modification of Steel Signpost Each Modification of Timber Signpost Each Modification of Sign Legend Each, Lump Sum Pedestrian Signal Face (Type_____) (Furnish Only) (Install Only) Each Traffic Signal Face (Type_____) (Furnish Only) (Install Only) Each Traffic Signal Controller Cabinet (Furnish Only) (Install Only) Each Traffic Signal Controller (Type_____) (Furnish Only) (Install Only) Each 614.14 614-34 Pay Item (con t’d) Pay Unit (con t’d) Loop Detector Wire (Furnish Only) (Install Only) Linear Foot Loop Detector Wire (Prefab) (Special) Linear Foot Traffic Signal Vehicle Detector Amplifier (Type_____) (Furnish Only) (Install Only) Each Traffic Signal Vehicle Detector (Type_____) (Furnish Only) (Install Only) Each Traffic Signal -Light Pole (Type_____) (Furnish Only) (Install Only) Each Traffic Signal Pole (Type_____) (Furnish Only) (Install Only) Each Traffic Signal Pedestal Pole (Type_____) (Furnish Only) (Install Only) Each Traffic Signal Span Wire Pole (Type_____) (Furnish Only) (Install Only) Each Pedestrian Push Button Post Assembly Each Accessible Pedestrian Signal Each Rumble Strip Linear Foot Pedestrian Push Button Each The traffic signal component item will be Furnish and Install unless the Summary of Approximate Quantities indicates whether it is to be (Furnish Only) or (Install Only) as appropriate. The LED optical units will not be paid for separately but shall be included in the cost of the Traffic Signal Face. The pedestrian LED optical units will not be paid for separately but shall be included in the cost of the Pedestrian Signal Face. All costs associated with the manufacturer's representative and obtaining the required documentation for tubular steel sign supports will not be measured and paid for separately but shall be included in the work. Payment for Loop Detector Wire (Prefab) (Special) will include all loop wire, preformed loop conduit to the first pull box outside the roadway, excavation, backfill, and all other work and materials necessary to complete the item. Wire from the first pull box outside the roadway to the controller will be measured and paid for per Section 613 under the pay item Wiring, Lump Sum. Conduit will be measured and paid for per Section 613, under the pay item for the appropriate diameter of conduit. Payment for Pedestrian Push Button Post Assembly will be full compensation for all work and materials, including wiring, required to complete the item. Payment will be full compensation for all work, materials and equipment required to install a completely operational APS per these specifications. The sample APS will not be measured and paid for separately but shall be included in the work. Testing of APS will not be measured and paid for separately but shall be included in the work. 614.15 614-35 BLANK OUT SIGN (LED) (SPEED RADAR) DESCRIPTION
614.15 This work consists of furnishing and installing a Light Emitting Diode (LED) Blank Out
Sign (Speed Radar) equipped with a directional radar unit for changing the message on the sign for oncoming traffic. The sign shall face one direction and shall display a primary and a secondary message. MATERIALS
614.16 LED Blank out signs shall meet the requirements shown on the plans and detailed in this
specification. The display shall be a character matrix configuration of two lines of 5 x 7 -pixel matrix characters that will allow the display of a pre -determined message defined in this specification. All display elements and modules shall be solid state. No mechanical or electromechanical elements or shutters shall be used. All materials furnished, assembled, fabricated or installed under this item shall be new, corrosion resistant and in strict accordance with the Contract. All details and functionality listed in this specification will be thoroughly inspected and tested by the Department. Failure to meet all details and functionality detailed in this specification shall be grounds for rejection of the equipment. The radar unit shall operate with the Blank out Sign to turn on and then change the primary sign message to a secondary message for the oncoming vehicles. The sign shall include a lockable power shut off mounted to the sign structure within 6 feet of ground level. The sign shall be fully compatible with the mounting hardware and support structure shown on the plans. The sign shall have a minimum design life of 20 years.
a.Materials shall conform to the applicable requirements of the National Electrical Code (NEC) and shall be a type currently recommended and approved by Underwriters’ Laboratories, Inc.
b.All Materials furnished, assembled, fabricated or installed shall be new, corrosion resistant, and in strict accordance with the Contract, and the NEC. The blank out signs shall be able to alternately display two fixed sign messages from a single housing in one direction. The primary message shall be a static message illuminated when a radar indication is triggered. When the radar indication is triggered, the primary message shall turn on and once a speed threshold is reached a secondary message shall be illuminated intermittently. The intermittent display of the secondary message shall illuminate the message for a period of two seconds on, and then one second off, repeating for a period of 30 seconds or once it does not detect a vehicle exceeding the trigger speed. Once the 30 second period has been reached the display shall return to the static primary message being illuminated for an additional 30 seconds before being turned off completely or back to the second message if another vehicle approaches in excess of the selected speed. The entire message shall be able to be switched on or off. The sign layouts provided in the plans list the details for t he message. The Contractor shall provide final message layouts to the Engineer for review and approval before fabrication of the blank out sign. When turned on, the blank out sign shall show the appropriate message and when turned off the sign shall be completely blank when not energized. No phantom words or legends shall be seen under any ambient light conditio ns when turned off. 614.17 614-36 The blank out signs shall be capable of dimming at night or during other low ambient light conditions. The blank out sign shall be fully functional while operating over an ambient temperature range of –30 to +165 ° F including a relative humidity of 0 – 100 percent, condensing; and it shall be capable of withstanding wind speeds up to 120 mph per AASHTO Standard Specifications for Structural Supports for Highway Signs Luminaires and Traffic Signals .
614.17 Certifications. Before start of the installation of the LED Blank out Signs the
Contractor shall provide the following documentation to the Engineer:
a.Shop drawings showing the sign housing and mounting brackets. Shop drawings shall be submitted per subsection 105.02.
b.Documentation and information on sign software and hardware.
614.18 Sign Housing. All component parts shall be easily and readily accessible by a single
person for inspection and maintenance. Access shall be from the front by lifting the face of the sign. The housing shall be weather tight, and compliant to the NEMA 3R Standard. The sign housing shall be capable of withstanding a wind loading of 120 mph without permanent deformation or other damage. The performance of the sign, including the visibility and legibility of the display, shall not be impaired due to continuous vibration caused by wind, traffic or other factors. The housing shall be designed to accommodate mounting on the rear vertical plane and shall be structurally sufficient to be mounted to the sign support structure. The sign housing and structural components for the tilting system including bolts and welds, shall be structurally sufficient to perform under all applicable loading conditions including gravity, wind, traffic, weather , roadway deicers, maintenance, and other environmental factors. Certified shop drawin gs supporting the design of the sign housing and mounting system shall be submitted per subsection 105.02. Except for the housing, all parts shall be made of corrosion resistant materials, such as plastic, stainless -steel, or aluminum. Painted steel is not acceptable. Self -tapping screws shall not be used. The exterior front face surfaces shall be finish coated by a system that meets or exceeds the American Architectural Manufacturers Association (AAMA) Specification No. 2605. The finish shall be matte black. The housing shall be constructed of aluminum (minimum thickness of 0.100 inches) with a natural mill finish. All exterior seams shall be continuously welded by an inert gas process, except for the coated fascia material. The glazing shall be constructed of 0.236- to 0.250- inch-thick clear polycarbonate sheets with surfaces that resist hazing from UV light, abrasion, and graffiti. The glazing shall be protected by a coated aluminum mask with apertures punched directly in front of each pixel. The coating shall meet or exceed the requirements of AAMA Specification No. 2605. The external front face panels shall be thermally insulated from the rest of the sign housing. The glazing, aluminum mask, and the external front face panels shall be easily replaceable from within the sign housing. 614.19 614-37 The bottom panel of the housing shall have a minimum of four drain holes, with snap -in, drain filter plug inserts. The housing shall be rated for NEMA 3R with the door internally gasketed to provide the necessary seal. All corners shall be welded for stability and watertightness. Silicone or other sealant shall not be used to seal joints. The sign housing shall come equipped with slotted aluminum extrusions mounted horizontally across the back of the sign. Each extrusion shall accept manufacturer supplied 1/2- inch stainless- steel mounting hardware with bolts that slide within the extrusion for complete adjustability in the horizontal direction. This configuration shall allow the sign to be mounted to one round vertical steel post member. The angular alignment of the sign housing shall be adjustable in the vertical direction to optimize the viewing angle for approach vehicles. The ventilation system shall be natural convection or forced air. The system shall be designed to adequately cool the LED pixels along with the front and rear of the display module and all other internal components.
614.19 Equipment. The equipment shall be modular in design such that major portions may be
readily replaced in the field. Modules of unlike functions shall be mechanically keyed to prevent insertion into the wrong socket or connector. All modules and assemblies shall be clearly identified with name, model number, serial number, and any other pertinent information required to facilitate equipment maintenance and replacement. All external connections shall be made by means of connectors. The connectors shall be keyed to preclude improper hookups. All wires to and from the connectors shall be color -coded or appropriately marked.
614.20 Electronics . All electronic components, except printed circuit boards, shall be
commercially available, easily accessible, replaceable and individually removable using conventional electronics repair methods. All Printed Circuit Boards (PCBs) shall be completely conformal coated with a silicone resin conformal coat. The exception for this coating shall be the pixels on the front of the PCB of the LED motherboards and any components in sockets. All discrete components, such as resistors, capacitors, diodes, transistors, and integrated circuits shall be individually replaceable. Components shall be arranged such that they are easily accessible for testing and replacement. A transformer shall be installed inside the casing if required to step down 110V service to 12V for the LED lighting and radar detection. All circuit designs shall utilize high quality electronic components and shall provide a meantime before failure of at least four years. The color of the pixels shall be amber and shall be 40 candelas at 20 mA. The brightness and color of each pixel shall be uniform over the entire face of the sign within the 15 -degree cone of vision from 1,100 feet to 200 feet in all lighting conditions. Each pixel shall contain two strings of LEDs. The pixel strings shall be powered from a regulated DC power source and the LED current shall be maintained at 25 plus or minus 3 mA per string to maximize life of the pixel. The failure of an LED in one str ing within a pixel shall not affect the operation of any other string or pixel. The LEDs shall be constructed of aluminum, indium, gallium, or phosphide. 614.21 614-38 Pixel power drawn from the DC supplies shall not exceed 1.5 watts per pixel, including the driving circuitry. A photocell shall be installed on the sign. This device shall permit automatic light intensity measurement of light conditions at the sign location. The photocell shall be mounted in a manner to measure ambient light conditions. Provisions shall be made to prevent perceivable brightening of the sign due to stray light from headlights shining upon the photo sensors at night. The power supplies shall be paralleled in a diode OR configuration such that one supply may completely fail, and the sign will still be supplied with enough power to run 40 percent of all pixels. All cables shall be securely clamped or tied in the sign housing. Adhesive attachments shall not be used. The Contractor shall locate the electrical power, as directed, and connect the source to the appropriate termination within the Blank Out Sign. A manufacturer’s representative shall be on site for the final inspection for up to three hours and to establish manufacturer’s approval of the installation.
614.21 Communication. The controller software shall be capable of displaying the
following types of messages: Static messages capable of displaying one of two fixed messages.
a.Flashing messages with the following ranges of adjustable timing:
1.Message time on from 0.5 to 60 seconds in 0.5 second increments.
2.Message time off from 0.5 to 60 seconds in 0.5 second increments.
b.Alternating messages capable with the following ranges of adjustable timing:
1.Primary message time on from 0.5 to 60 seconds in 0.5 second increments.
2.Primary message time off from 0 to 60 seconds in 0.5 second increments.
3.Alternate message time on from 0.5 to 60 seconds in 0.5 second increments.
4.Alternate message time off from 0 to 60 seconds in 0.5 second increments. It shall be possible to flash the design message in an alternating message at the adjustable frequencies listed above for flashing messages. The flashing period shall be a sub-multiple of the associated alternating on time. It shall also be possible to f lash the design message in a static message. The sign shall also be capable of showing no messages (fully blank) until a radar trigger is registered by the system.
c.Radar. The Blank Out Sign shall be equipped with a directional radar unit for sensing and determining the speeds of oncoming traffic only. The radar unit shall be capable of detecting approach speeds from 5 to 100 mph. The radar shall detect average size vehicles from a distance of approximately 2000 feet. The radar shall be compatible with the remote programming requirements. The radar shall operate in a Radar Trip Mode. 614.21 614-39 In the Radar Trip Mode, the Blank Out Sign shall remain blank until a trigger is received and then display one of two messages under control of the radar: one when the radar indicates a vehicle is traveling above a configurable speed (or “trigger speed”) and a second message when the radar indicates no vehicle traveling over the trigger speed. Note that each of these messages shall allow from one to two pages. To prevent flickering of the message if a vehicle is near the trigger speed, a message dwell time shall keep the message displayed for a configurable number of seconds after the vehicle has dropped below the trigger speed. The dwell time shall default to two seconds. The radar unit shall be mounted outside of the sign. The radar gun shall be mounted on an adjustable bracket, allowing for minor adjustment of both azimuth and elevation.
d.Warranty. The Contractor shall ensure that the manufacturer will guarantee the product for a minimum of one year from the date of shipment. During the warranty period, the supplier or manufacturer shall repair with new or refurbished materials, or replace at no charge, any product containing a warranty defect. Product repaired or replaced under warranty by the manufacturer or supplier shall be returned with transportation prepaid. During the warranty period, technical support shall be available from the manufacturer via telephone within 8 hours of the time a call is made by the Department, and this support shall be available from factory -certified personnel or a factory -certified i nstaller at no additional charge to the Department.
e.Maintenance and Support. The supplier shall maintain an adequate inventory of parts to support maintenance and repair of the blank out signs. These parts shall be available for delivery within 30 days of placement of an acceptable order at the supplier's then current pricing and terms of sale for said parts. The supplier shall maintain an ongoing program of technical support for the blank out signs. This technical support shall be available via telephone, or via personnel sent to the installation site upon placement of an acceptable order at the supplier's th en current pricing and terms of sale for on -site technical support services. Installation or training support up to three hours shall be provided by a factory -authorized representative. All product documentation shall be written in the English language. Four complete sets of operation and maintenance manuals shall be provided. The manuals shall include the following: Complete and accurate schematic diagrams, including a wiring diagram.
1.Complete installation procedures.
2.Complete performance specifications (functional, electrical, mechanical and environmental) on the unit.
3.Complete parts list including names of vendors for parts not identified by universal part numbers such as JEDEC, RETMA or EIA.
4.Pictorial of component layout on circuit board.
5.Pin-out and pin -in of connectors.
6.Complete maintenance and troubleshooting procedures.
7.Complete stage- by-stage explanation of circuit theory and operation. In-cabinet wiring diagram of the blank out sign shall be provided in each sign enclosure. 614.22 614-40 CONSTRUCTION REQUIREMENTS
614.22 The Contractor shall install the blank out sign as shown on the plans.
The Contractor shall conduct all tests described, which include the following operational tests. The following blank out sign functions shall be demonstrated for each of the signs installed on the project before acceptance:
1.Turning on and off in daytime mode.
2.Turning on and off in nighttime mode.
3.Demonstration of the radar trip to change from the primary message to the secondary message.
4.Demonstration of the dwell and flashing adjustments.
5.Demonstration of the dimming features for the sign. METHOD OF MEASUREMENT
614.23 The Blank Out Sign (LED) (Speed Radar) will be measured by the actual number that
are furnished, installed and accepted. BASIS OF PAYMENT
614.24 Payment will be made under:
Pay Item Pay Unit Blank Out Sign (LED) (Speed Radar) Each Payment will be made per the following: The Engineer will authorize payment for 90 percent of the unit price bid upon completion of the installation and submittal of all certifications. The Engineer will authorize payment for the remaining 10 percent of the unit price bid upon the successful completion of the testing and according to terms of the Contract. Payment will be full compensation for all labor, materials, and equipment necessary to complete the work, including the directional radar gun, sign controller, controller interface box, sign housing, electronics, communications, and standard warranty. Having a manufacturer’s representative on -site will not be measured and paid for separately but shall be included in the work. Testing, training and providing manuals will not be measured and paid for separately but shall be included in the work. 615.01 615-1 SECTION 615 WATER CONTROL DEVICES DESCRIPTION
615.01 This work consists of the construction of water and erosion control devices per these
specifications, details shown on the plans and to the lines and grades established. MATERIALS
615.02 Slide headgates and automatic drain gates shall be of the sizes designated and shall be
approved by the Engineer. Parshall measuring flumes including wings shall be made of galvanized sheet steel material. Galvanize coating shall be “light commercial” minimum. Thickness of material and fabrication method shall be as approved. Measuring flumes shall have reinforced edges and an inlet throat of the dimensions designated on the plans. Embankment protectors shall be made from material conforming to the applicable sections of these specifications. CONSTRUCTION REQUIREMENTS
615.03 Construction methods shall conform to the requirements of Section 603.
METHOD OF MEASUREMENT
615.04 Automatic drain gates, Parshall measuring flumes and embankment protectors will be
measured by the number of units of the various sizes installed. Slide headgates will be measured by the number of units of the various sizes and frame heights installed. BASIS OF PAYMENT
615.05 The accepted quantities will be paid for at the contract unit price for each of the pay
items listed below that appear in the bid schedule. Payment will be made under: Pay Item Pay Unit ______Inch Slide Headgate (______Foot Frame) Each ______Inch Automatic Drain Gate Each ______Inch x _____Inch Parshall Measuring Flume Each Embankment Protector (Type______) Each Pipe, concrete, or other material used with any of the above items will be bid under the appropriate Section.
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 655–694 of 943.