Article 1 — Description
Installation . Install highway traffic signals . Upgrade. Modify or change existing traffic signal s as shown on the plans. Removal . Remove, store, and salvage traffic signals .
Article 2 — Materials
Ensure electrical materials and construction methods conform to the NEC and additional local utility requirements. Furnish new materials as shown on the plans. Ensure all materials and construction methods are as shown on the plans and in accordance with this Item and the following Items . Item 450, “Railing” Item 610, “Roadway Illumination Assemblies ” Item 618, “Conduit” Item 620, “Electrical Conductors” Item 621, “Tray Cable” Item 625, “Zinc -Coated Steel Wire Strand” Item 628, “Electrical Services ” Item 636, “Signs” Item 656, “Foundations for Traffic Control Devices ” Item 682, “Vehicle and Pedestrian Signal Heads” Item 684, “Traffic Signal Cables” Item 686, “Traffic Signal Pole Assemblies” Item 687, “Pedestrian Pole Assemblies” Item 688, “Pedestrian and Vehicle Detectors” Provide controller assemblies in accordance with DMS -11170 , “Fully Actuated, Solid- State Traffic Signal Controller Assembly,” and as shown on the plans. When shown on the plans, anti -gaffitti coating will be in accordance with DMS -8111 , “Anti -Graffiti Coatings.” Provide devices in accordance with DMS -11171 , “Malfunction Management Unit (MMU),” and as shown on the plans. Provide controllers in accordance with DMS -11172 , “Preemption Controller,” and as shown on the plans. Provide controllers in accordance with DMS -11173 , “Traffic Controller,” and as shown on the plans. Provide prequalified controller assemblies from the Department’s MPL. Provide flasher assemblies in accordance with DMS -11160 , “Flasher Controller Assembly,” and as shown on the plans. Provide prequalified flasher assemblies from the Department’s MPL. 925 Sampling and testing of traffic signal controller assemblies and internal devices will be in accordance with Tex-1170-T .
Article 3 — Construction
3.1 Installation . Install traffic signal controller foundations in accordance with Item 656.
3.1.1 Electrical Requirements.
3.1.1.1. Electrical Services. Arrange for electrical services and install and supply materials not provided by the utility company as shown on the plans. Install 120V , single -phase, 60- Hz AC electrical service unless otherwise shown on the plans. 3.1.1.2. Conduit . Install conduit and fittings of the sizes and types shown on the plans. Conduit of larger diameter size than that shown on the plans may be used with no additional compensation, providing the same diameter size is used for the entire length of the conduit run. Extend conduit in concrete foundations 2–3 in. above the concrete. Seal the ends of each conduit with approved sealant, after all cables and conductors are installed. 3.1.1.3. Wiring . Furnish stranded XHHW conductors as shown on the plans. If a size is not shown on the plans, use a minimum No. 14 AWG. Install aboveground cables and conductors in rigid metal conduit, except for span wire suspended cables and conductors, drip loops, and electrical wiring inside signal poles , unless otherwise shown on the plans. Make power entrances to ground- mounted controllers through underground conduit. Wire each signal installation to operate as shown on the plans. Attach ends of wires to properly sized self -insulated solderless terminals. Attach terminals to the wires using a ratchet- type compression crimping tool properly sized to the wire. Place pre- numbered identification tags of plastic or tape around each wire adjacent to wire ends in the controller and signal pole terminal blocks. Do not strip traffic signal cable until it has passed into the location that requires termination. Splices will not be permitted except as shown on the plans, unless each individual splice is approved in writing. Make all allowed splices watertight. Ensure both neutral buses are located with one on the left and one on the right bonded together. Relocate neutral bus if not oriented in the cabinet in this manner. Ensure gauge of wire size used to connect electrical equipment inside the cabinet is sized appropriately for amperage load for the specific device, circuit breaker, or duplex receptacle in accordance with the NEC. Install Category 6 Ethernet communication cables in accordance with Special Specification, “Networking Intelligent Transportation System (ITS) Communication Cable,” and connect networked equipment inside the controller cabinet assembly to field Ethernet switch following the color scheme and assignment information as follows. White . Ethernet switch (1- ft. patch cord). Blue . Traffic signal controller. Green . Malfunction monitor unit (MMU). Red. Battery backup unit (BBU). Yellow. Accessible pedestrian system. Black. Detection (e.g., radar and video). Purple . Pan, tilt, and zoom (PTZ) camera. Orange . Other. Gray . Other. Pink . Broadband radio. 926 A standard bundle of cables provided by the cabinet vendor is identified in DMS -11170 . Additional CAT 6 Ethernet cables, provided as necessary, must follow the color scheme and assignment above to connect additional networked equipment. Railroad connection between traffic cabinet and bungalow must be a minimum No. 14 AWG 15- conductor and follow the color code chart shown in Table 1. Table 1 Railroad Preemption Color Code and Functional Connection Conductor Color Code Railroad Interface Field Terminal Connections Conductor Identification 1 Black HLTH - Health Status DC - 2 White – Spare 3 Red HLTH+ Health Status DC+ 4 Green – Spare 5 Orange XR IN Simultaneous DC - 6 Blue TCR IN Advance DC - 7 White/black stripe – Spare 8 Red/black stripe GD/ISLD IN Gate Down/Island 9 Green/black stripe APP OUT Advance Pedestrian Preemption 10 Orange/black stripe XR OUT Simultaneous 11 Blue/black stripe TCR OUT Advance Primary 12 Black/white stripe – Spare 13 Red/white stripe GD/ISLD OUT Gate Down/Island DC - 14 Green/white stripe APP IN Advance Pedestrian Preemption DC - 15 Blue/white stripe SUPR Advance Secondary 3.1.1.4. Grounding and Bonding. Ground and bond conductors in accordance with the NEC. Ensure the resistance from the grounded point of any equipment to the nearest ground rod is less than 1 ohm. Install a continuous bare or green insulated stranded copper wire (equipment ground) throughout the electrical system that is the same size as the neutral conductor. If a size is not shown on the plans, use a minimum No. 8 AWG. Connect the equipment ground to all metal conduit, signal poles, controller housing, electrical service ground, ground rods, and all other metal enclosures and raceways. Inside the controller cabinet assembly, jumper between neutral bus and ground bus is not required. Remove jumper if provided by cabinet manufacturer. Provi de stranded copper wire bonding jumpers that are minimum No. 8 AWG.
3.1.2 Controller Assemblies. Construct controller assembly foundations in accordance with Item 656.
Immediately before mounting the controller assembly on the foundation, apply a bead of exterior rated penetrating sealant to the cabinet base or cabinet riser. Seal any space between conduit entering the controller assembly and the foundation with exterior rated penetrating sealant. Stake cabinet foundation forms and underground conduit entering the foundation before installation and secure Department approval before pouring foundation. Cabinet location may vary from that shown on the plans to accommodate field conditions as approved. For controller cabinet assemblies installed on a slope, ensure the cabinet primary door faces and opens to the low side of the slope. If safety rail is required as shown on the plans, it must be in accordance with Item 450. Furnish anchor bolts to mount the cabinet or cabinet riser to the foundation. Manufacturer to determine the appropriate size and type of anchor bolt by cabinet type and foundation size. Provide appropriate mounting plates and any other necessary hardware to mount the cabinet on a foundation. Coordinate with the Department on delivery of cabinet keys. Place the instruction manual and wiring diagrams for all equipment in the controller cabinet inside the controller cabinet.
3.1.3 Preservation of Sod, Shrubbery, and Trees . Replace sod, shrubbery, and trees damaged during the
Contract. 927 3.1.4. Removal and Replacement of Curbs and Walks. Obtain approval before cutting into or removing walks or curbs not shown on the plans to be removed or replaced. Restore any curbs or walks removed equivalent to original condition after work is completed, to the satisfaction of the Engineer.
3.1.5 Intersection Illumination . Install luminaires on signal poles as shown on the plans.
3.1.6 Signal Timing Plan . The traffic signal timing plan will be provided by the Department or local entity.
3.1.7 Test Period . Operate completed traffic signal installations continuously for at least 30 days in a satisfactory
manner. Designate in writing a sufficiently skilled individual responsible for maintenance and operation of the traffic signals who is available 24 hr. per day, and able to be onsite within 24 hr. of notification by the Engineer, unless otherwise shown on the plans. If any Contractor -furnished equipment fails during the 30-day test period, repair or replace that equipment. This repair or replacement, except lamp replacement, will start a new 30 -day test period. Replace materials that are damaged or have failed before acceptance. Replace failed or damaged existing signal system components when caused by the Contractor. The Department will relieve the Contractor of maintenance responsibilities upon passing a 30-day performance test of the signal system and acceptance of the Contract.
3.2 Upgrade . Remove the existing items and install new items as shown on the plans or as directed. For newly
installed items, refer to Section 680.3.1., “Installation.” Ensure items designated for salvage are removed in a manner to avoid undue stress or damage. When the removed item leaves an opening, cover the opening with similar material to an equivalent condition. When the removed item leaves an unused signal cable, remove the cable. When the removed item leaves unused conductors within a signal cable still in use, trim back and tape off to ensure no electrical shorts by unused conductors. Store items designated for reuse or salvage at locations shown on the plans or as directed.
3.3 Removal . Remove existing electrical services, pedestal poles, strain poles, mast arm pole assemblies,
luminaires, signal heads, vehicle detector equipment, controllers, cables, and other accessories. Remove materials so damage does not occur. Remove and store items designated for reuse or salvage at locations shown on the plans or as directed. Remove abandoned concrete foundations, including steel, to a point 2 ft. below final grade. Backfill holes with material equal in composition and density to the surrounding area. Replace surfacing material w ith similar material to an equivalent condition. Accept ownership and dispose of unsalvageable materials in conformance with federal, state, and local regulations.
Article 4 — Measurement
This Item will be measured by each traffic signal installed, upgraded, or removed. A traffic signal is a signalized intersection controlled by a single traffic signal controller .
Article 5 — Payment
The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Installation of Traffic Signals” of the type (traiffic signal or flashing beacon) specified, or “Removing Traffic Signals.”
5.1 Installation . This price is full compensation for furnishing, installing, and testing the completed installation of
the traffic signal controller and associated equipment with network cabling, controller assembly, foundations, luminaires, damping plates, mounting hardware, and Department -provided items; preservation and replacement of damaged sod, shrubbery , and trees; removal and replacement of curbs and walks; and 928 materials, equipment, labor, tools, and incidentals. The Department will pay for electrical energy consumed by the traffic signal . New drilled shaft foundations for traffic signal poles will be paid for under Item 416, “Drilled Shaft Foundations.” New safety rail will be paid for under Item 450. New sidewalks or pedestrian ramps will be paid for under Item 531, “Sidewalks.” New conduit will be paid for under Item 618. New electrical conductors will be pai d for under Item 620. New ground boxes will be paid for under Item 624, “Ground Boxes.” New span wire will be paid for under Item 625. Wire lashing or cable ties required to secure aerial cables to the messenger wire will be subsidiary. New electrical serv ices will be paid for under Item 628. New signs will be paid for under Item 636. New internally illuminated signs will be paid for under Special Specification. New vehicle and pedestrian signal heads will be paid for under Item 682. New traffic signal cabl es will be paid for under Item 684. New traffic signal pole assemblies will be paid for under Item 686. New traffic signal detectors will be paid for under Item 688 or Special Specification. If the design of the intersection control spans more than one int ersection, such as a restricted crossing U -turn (RCUT), and requires more than one traffic signal cabinet, this Item will be measured by each traffic signal cabinet installed.
5.2 Upgrade . This price is full compensation for removing the various traffic signal components; removing the
controller foundations; disposal of unsalvageable materials; hauling; and materials, equipment, labor, tools, and incidentals , as shown on the plans or as directed. This price is full compensation for furnishing, installing, and t esting the completed installation, controller and associated equipment, controller foundations, luminaires, damping plates, and mounting hardware; preservation and replacement of damaged sod, shrubbery , and trees; removal and replacement of curbs and walks ; and materials, equipment, labor, tools, and incidentals. The Department will pay for electrical energy consumed by the traffic signal . New drilled shaft foundations for traffic signal poles will be paid for under Item 416. New sidewalks or pedestrian ram ps will be paid for under Item 531. New conduit will be paid for under Item 618. New electrical conductors will be paid for under Item 620. New ground boxes will be paid for under Item 624. New span wire will be paid for under Item 625. Wire lashing or cable ties required to secure aerial cables to the messenger wire will be subsidiary. New electrical services will be paid for under Item 628. New signs will be paid for under Item 636. New internally illuminated signs will be paid for under Special Specification. New vehicle and pedestrian signal heads will be paid for under Item 682. New traffic signal cables will be paid for under Item 684. New traffic signal pole assemblies will be paid for under Item 686. New traffic signal detectors will be paid for under Item 688 or Special Specification.
5.3 Removal . This price is full compensation for removing the various traffic signal components; removing the
controller foundations; disposal of unsalvageable materials; hauling; and materials, equipment, labor, tools, and incidentals .