CITY OF SPARKS TRAFFIC SIGNAL EQUIPMENT The City of Sparks traffic signal equipment shall be installed in accordance with national standards and codes including, but not limited to, the most current edition of The Manual on Uniform Traffic Control Devices (MUTCD), the National Fire Protection Association (NFPA), the National Electrical Code (NEC), etc. In addition, the following standards shall, to the best possible ability of the contractor, be met. Any conflicts between the national standards and codes and the City standards shall be resolved by contacting the City Transportation Manager for a ruling. Safety Lighting Shall be LED only and placed such that it provides a minimum of 2.0 FC of average illuminance at the sidewalk. All LED style lighting fixtures shall meet the following minimum criteria regardless of manufacturer: 1. The housing shall be all metal with the exception of the lens. 2. The housing shall be silver in color except where heat dissipation components are involved. 3. There shall be a minimum 10 year warranty. 4. The unit shall provide a Type IV Medium optical spread utilizing a minimum of 80 LED units. 5. Each complete and assembled fixture shall require no more than 190 System Watts. 6. The fixture shall be capable of utilizing Universal 120-277V Line Power. 7. The fixture shall have Corrected Color Temperature (CCT) of 4000K. 8. The fixture shall not exceed 700 mA Drive Current. 9. The fixture shall be Illuminating Engineering Society of North America (IESNA) LM-79-08 compliant. 10. The unit shall be constructed in such a manner that it can be mounted to a standard 2” ID horizontal pipe with +/- 5 degree adjustment with no specially constructed mounts or wire splicing methods. 11. No optional shorting cap receptacle allowed. Photocell shall be mounted at the metered service. Signal Heads All traffic signal heads shall be flat black in color, outfitted with louvered back plate, tunnel visors with ¾ slot, open to the bottom. Plumbizer for mast arm mounts shall be located between the red and yellow signal indication unless noted differently on the plans. All mast arm mounted traffic signal heads shall be aligned to the center of the travel lane that the indicator is to control. Light Emitting Diodes (LED) All red, yellow, and green signal indications for all vehicular signal heads shall be a 12” LED modules and follow ITE VTCSH-LED guidelines. LED modules acceptable for signal installation shall be Dialight 433 series or approved equal. If the indicator requires a green lens, the indicator lens shall be clear and have no tint. Indicators for the Yellow and Red may have a tinted lens or a clear lens. All pedestrian Page 1 of 14 signal indications shall be 16” x 18” ITE compliant countdown indications. The hand symbol shall be Portland orange and the walking man symbol shall be lunar white. Video Detection & Cameras Video detection systems shall be evaluated on an individual basis by the Transportation Manager. The contractor shall provide all labor, equipment and cabling for a complete installation of the system to the satisfaction of the city transportation department. Pelco camera mountings “Astro-Brac” along with a 74” tube extension shall be used for all mast arm installations. Cameras shall be located in such a manner that all vehicles can be accounted for and detected until the vehicle enters the intersection. Field splicing of the video wiring between the camera and cabinet is not permitted. Prior to acceptance, all video equipment shall be field tested in accordance to the manufactures recommendations. Loop Detection Loop detector wire shall be I.M.S.A. Spec. 51-5-1984 #14 AWG to #20 AWG with Polyethylene (XLPE/XHHW) encasing tube or approved equal. Loop Detector lead-in cable (LLC) shall be I.M.S.A. Spec 50-2-1984 # 16 AWG or approved equal. Splicing of the LLC is not permitted between the signal cabinet and loop detector wire. Loops shall be a minimum of 6’ diameter circle with 3 turns per loop. Loops in adjacent lanes shall be wound in opposite directions. Preformed loops shall be encased in PVC and shall be placed between the structural and wearing course unless otherwise approved by the City Transportation Manager. All new roadways shall have the loops placed between the structural and wearing course. Loops shall be placed in accordance to the Nevada Department of Transportation, Standard Drawing called “Loop Detectors”. The saw cut depth for all home runs shall be a minimum of 2½ inches. There shall be no more than 2 twisted pairs per sawed loop slot. The maximum area of asphalt allowed to be displaced shall be no more than 6” x 6” when installing loops. The LLC shall have 4 to 6 turns per foot between the end of the saw slot and the detector to prevent separation of the wires. When making the final connections in the controller cabinet, crimp type connectors should be soldered for additional security and the screws on the terminal strip securely tightened. The shield must be floated (left unconnected and insulated) at the splice end and shall be grounded to earth ground at the cabinet end only. LLC shall be connected to no more than 4 loops and be clearly marked by permanent means (t ag and marker) in the pull box splice point and the traffic signal cabinet. Loop amplifiers shall be EDI-LMD622T Loop Amplifier or approved equal. One Loop Amplifier shall be EDI-ORACLE 2E or approved equal. Loop Sealant Loops may be sealed using one of the following options: Hot-melt rubberized asphalt sealant must: 1. Be in solid form at room temperature and fluid at an application temperature range from 190 to 205 degrees C 2. Not produce toxic fumes 3. Be suitable for use in both asphalt concrete and concrete pavement 4. Be packaged in containers clearly marked Detector Loop Sealant with the manufacturer's batch and lot number. Page 2 of 14 The cured hot-melt rubberized asphalt sealant must comply with the requirements shown in the following table: Cured Hot-Melt Rubberized Asphalt Sealant Requirements Quality characteristic Test method Requirement Cone penetration (max, 1/10 mm) ASTM D 5329, sec. 6a 35 Flow (max, mm) ASTM D 5329, sec. 8b 5 Resilience (min, %) ASTM D 5329, sec. 12c 25 Softening point (min, °C) ASTM D 36 82 Ductility (min, cm) ASTM D 113d 30 Flash point, Cleveland Open Cup (min, °C) ASTM D 92 288 Viscosity (Pa·s) ASTM D 4402e 2.5–3.5 aAt 25 °C, 150 g, 5 s bAt 60 °C cAt 25 °C dAt 25 °C, 5 cm/minute eBrookfield Thermosel, no. 27 spindle, 20 rpm, 190 °C Loops and lead-in wires shall have a 1” long non-metallic backer-rod covering the loop wires to secure them during the sealing process. The backer rod shall be at least one (1) inch below the top of pavement. Backer-rods must comply with ASTM D5249, be expanded, closed-cell polyethylene foam with a diameter at least 25 percent greater than the saw cut joint width. Sealant backer-rod material shall be easily compressed and installed in the joint reservoir and shall be heat resistant. Elastomeric Loop Sealants - Sealant shall be a flexible polyurethane encapsulant intended for sealing and protecting vehicle detector loop wires installed in saw cuts. The sealant, upon application, must be of a sufficiently free-flowing consistency to fill the road cavity thoroughly. The sealant must be self-leveling, not shrink, swell, or crack during or after its curing process. Application equipment, techniques, and temperature range must be in accordance with the manufacturer’s recommendations. Sealants must have a minimum shelf life of 12 months. Backer-rod needs to be placed a minimum of every two (2) feet to keep the wire from floating up during the application process. All Other Detection Types Shall be considered on a case by case basis by the Transportation Manager. The contractor shall provide all labor, equipment and cabling for a complete installation of the system to the satisfaction of the city transportation department. Detection Devices shall be located in such a manner that all vehicles can be accounted for and detected until the vehicle enters the intersection. Field splicing of wiring between the detection device and the cabinet is not permitted. Prior to acceptance, all equipment shall be field tested in accordance to the manufactures recommendations. Emergency Vehicle Detection All emergency preemption shall be “Global Traffic Technologies Opticom Infrared System” emergency vehicle detection, latest version (rack mounted). Phase selectors shall be model 764 Multimode Phase Selector. Use 721 or 722 detectors for IR applications. Use Opticom Model 3100 GPS Radio Unit containing GPS receiver with antenna and a 2.4 GHz spread spectrum transceiver with antenna for GPS applications. Include a Model 1070 GPS Installation Cable that is a maximum of 300’ in Page 3 of 14 length for GPS applications. Prior to acceptance, all Opticom equipment shall be field tested in accordance to the manufactures recommendations. Signal Poles Utilize all State of Nevada standard poles including Type 1A, 1B, 7, 28, 30, 30A, 35 & 35A. All signal poles over 10’0” shall be equipped with three (3) hand holes, one (1) at the base of the pole and one (1) opposite the mast arm on back of pole, and a 27” hand hole terminal compartment on the back side of the pole, with the top of the hole six (6’) feet from ground level, placed 180 degrees (180°) from the mast arm. Pedestrian Push Buttons (PPB) shall be placed so not to conflict with terminal compartment.