7-57 currently listed on the department’s Qualified Products List (Q PL) of Rolled Erosion Control Products. See Section 618.10 - Seeding, Maintenance and Acceptance. 717.063 Ground Anchors Shall consist of metal staples or biode gradable stakes as recommended by the manufacturer of the erosion control blanket to be used. 717.07 Herbicide The herbicide shall be an approved chemical r egistered in the State of Maine for the required treatment. 717.09 Humus Humus shall be an organic substance meeting the f ollowing: Property Specification pH 4.5 to 8.0 1 inch Sieve Designation 100 percent passing Soluble Salts Content <4.0 mmhos/cm Organic Matter 35 percent, minimum Dewar Self Heating >5 stability Humus may be a natural peat from sedge, sphagnum or reed origin , or compost from source separated materials that may include leaf and yard trimm ings, food scrapes, food processing residues, manure and other agricultural residuals, o r biosolids. Humus shall contain no visible admixture of r efuse or other physical contam inates or any material toxic to plant growth. SECTION 718 - TRAFFIC SIGNALS MATERIAL 718.01 Vehicular Signal Indications a. Vehicular signal heads for traffic signals and flashing bea cons shall conform to or exceed the current edition of the ITE "Standard for Adjustable Face Vehicle Traffic Control Signal Heads". Each housing section shall be complete with a o ne-piece, hinged door mounting for the lens and other parts of the optical system, wa tertight gaskets, and simple door-locking device. The optical system shall be mounted so th at the various parts may be swung open for ready access or removal. The sections shall be interchangeable and constructed so that sections can be removed or added. All new traffic signal (vehicular and/or pedestrian) heads shall have light emitting optical asse mblies for all colors. There shall be a round opening in the top and bottom of each he ad to receive 1½ inch supporting pipe frame. All part s of the housing, including the doors and end plates shall be of die cast aluminum free from flaws, cracks, blow holes or oth er imperfections or polycarbonate. 7-58 All exposed bolts, screws, hinge pins, and door-locking devices shall be stainless steel. All interior screws and fittings shall be stainless steel or ap proved nonferrous, corrosion- resistant material. All gaskets, including door, optical assembly, exclusive of lam pholder gaskets, shall be of neoprene. Lampholder gaskets shall be of a material unaffec ted by heat. All light emitting diode optical assemblies shall be wired so t hat a white wire will be connected to the ground and black or c olored wire to the termin al of the LED optical assembly. The wires shall in turn be connected to the terminal block mounted inside at the back of the housing. The terminal block shall have sufficient screw type terminals to terminate all field wires and lamp wires with separate screws. The terminals to which field wires are attached shall be permanently identified or the wirin g shall be color coded to facilitate fieldwork. Each LED assembly shall be provided with a removable visor hood unless tunnel hoods or louvered hoods are specified on the plan s. Hoods for 8 inch sections shall be 7 inches long, hoods for 12 inch sections shall be 9½ inches long. All heads to be modified shall be retrofitted with light emitti ng diode optical assemblies for all colors. When 2 or more vehicular signal heads or a combination of vehic ular signal heads and pedestrian signal heads are installed on 1 pole, only 1 conduit riser shall be used. The signal heads shall not be connected together by the use of liquid tigh t flexible metal conduit and terminal fittings. All new vehicular signal faces installed at any one intersectio n shall be of the same make and type. LED optical assemblies for the 8 inch units shall be 650-lumen minimum initial output, 120 volt, 100,000 hour rated life, clear traffic signal lamps. Lamps for the 12 inch units shall be 1900-lumen minimum initial output, 120 volt, 100,000 h our rated life. The intensity and distribution of light from each illuminated s ignal LED optical assembly shall conform to the latest revisions of the ITE "Stan dard for Adjustable Face Vehicle Traffic Control Signal Heads", and the "Standard for Tr affic Signal LED".
b.Programmed Visibility Vehicular Indications The programmed visibility traffic signal vehicular indication shall optically determine the visibility z one of indication without the use of hoods or louvers. The projected signal may be visible o r selectively veiled anywhere within 15° of the optical axis. The signal head shall be adjustable to various angles between 9 ° above and below horizontal. No indication shall result from external illuminat ion and each indication shall be illuminated separately. The visibility of the signal indicatio n shall be adjustable within the signal head to fit the lane or lanes in which traffic is to be controlled. 7-59 The illumination lamp shall be a nominal 150 watt, 115 volt AC, 3 prong, sealed beamed type, having an integral reflector and an average rated life of 6,000 hours. A dimming device shall be provided to reduce the candela at each signal h ead for nighttime operation to approximately 15 percent of the candlepower for daytime operati on. A circular reflector with a specular inner surface shall mate t he lamp to a diffusing element. An internal imaging surface shall be provided to permit an effe ctive veiling system to be applied as determined by the desired visibility zone. The Cont ractor shall notify the Resident 48 hours prior to the application of the veiling syste m. The optical limited-diffuser shall be provided with positive indexing means and shall be com posed of heat resistant glass. The objective lens shall be a high resolution planar incrementa l lens thermetically sealed within a flat laminate of weathe r resistant acrylic. The lens outline shall be symmetrical. Lens colors shall conform to the latest ITE transmittance and c hromaticity standards. The signal shall be housed in cast aluminum, conforming to the latest ITE alloy and tensile requirements. Each section shall have a sun visor. Th e cast aluminum shall have a chromate preparatory treatment before the application of green or yellow baked enamel prime and finish. The lens cover and the interior of the case shall be flat black. Hinge and latch pins shall be stainless steel. All access openings shall be sealed with weather resistant rubber gaskets. The lamp fixture housing shall be readily accessible and lamp r eplacement shall not require special tools nor necessitate major disassembly. Electrical connections between the case and lamp holder shall b e an interlock assembly that disconnects the lamp holder when open. Number 16 wire sha ll be used to connect the lamp receptacle to the signal head terminal. The signal head shall be capable of being mounted to standard 1 ½ inch fittings as a signal head section, as a multiple section face or in combinati on with other signal heads. The signal section shall be provided with a rigid connection th at permits tilting from at least 9° above or below the horizontal while maintaining a comm on vertical line through couplers and conduit. No special tools should be needed for se rvicing or mounting.
c.All exposed wiring for traffic signals, beacons, solar panel s, etc shall be imsa 19-1 rated and be of sufficient size to carry the full load unless approved by the resident engineer 718.02 Pedestrian Signal Indications All pedestrian signal he ad indications shall be displayed within a rectangular background and shall consist of symbolized messages (Upraised Hand and Walking Person).that shall be at least 6 inc hes high. All pedestrian heads shall be LED optical assemblies and shall have countdown displays. 7-60 LED optical assemblies shall be 1,900-lumen minimum initial ou tput, 120-volt, 100,000 hour rated life. When 2 or more pedestrian signal heads are installed on 1 wood pole, only 1 conduit riser shall be used. The pedestrian signal heads shall not be connected by the use of liquid tight flexible metal conduit. Pedestrian signal heads which use fiber optic bundles to form the message shall achieve the color of the messages by filters between the light source and the optical bundles. The legends shall be 5 inches minimum in height with a ⅝ inch s troke. The housing materials shall conform to the requirements for conventional pe destrian signal housings. The message shall be illuminated by a light source designed to operate on a 120-volt source and shall be rated for 100,000 hour average life. The flashing message shall be accomplished by use of a solid-state flasher required for conve ntional pedestrian signal indications. 718.03 Signal Mounting All trunnions, brackets, and suspensio ns used for assembling and mounting signal control faces shall be entirely weather tight. The inside area of the cross section of the tubular arms shall not be less than the inside area of 1½ inch IPS pipe to permit the signal control wires or cable to be inse rted through them. After final adjustment, all vehicular and pedestrian signal he ads, regardless of mounting arrangement, shall be fastened by a positive locking d evice acceptable to the Resident. This device shall prevent any deviation from the pos ition set, but shall allow for readjustment of the signal head later in the same installation or in another installation without the necessity of damaging any part of the signal head. 718.04 Vehicular Loop Detectors Vehicle detectors shall consi st of wire loops and self-contained detection equipment capable of registering indep endently the presence or passage of any vehicle passing over the loop at any speed up to 70 mph and at any temperature between -35 and +165°F. Each loop detector shall c ontain its own integral power supply and shall operate between 95 VAC and 135 VAC. The input power shall be protected by fuse or resettable circuit breaker. The detector amplifiers shall be self-tuning, solid state cons truction except for the output relay. Printed circuit design shall allow the component s to be removed and replaced without permanent damage to the printed circuit boards or track s. Detector amplifiers installed in a common cabinet shall have a frequency difference and shall not interfere with the operation of other detector am plifiers installed in the same cabinet. All input and output circuits for each amplifier shall enter b y a single connector provided with a threaded shell. All controls, indicator lights, meters, fuseholders, circuit breakers and connectors shall be mounted on the front panel of the detector amplifier. All 7-61 controls shall be adjustable without the use of tools and the c ontrols shall be clearly and permanently identified. The detector unit shall show a visible indication of vehicle c alls. After a power interruption, the units shall return to normal operation within 30 seconds. If any vehicle stops over a portion of the loop registering a call, the detect or shall be capable of detecting additional vehicles traversi ng the loop after approximately 15 seconds. Detectors shall detect vehicles by lanes of traffic and shall not detect traffic moving away from the intersection when properly positioned in normal t ravel lanes. Detection must be positive and not erratic under all actual operating conditio ns with the exception of storm damage to the detector. All detectors shall be capable of detecting all four-wheeled v ehicles for all lengths of lead-in up to 750 feet for single detection loops and for a com bined lead-in length of 750 feet in the case of multiple loops. Detector loop wire shall be numbe r 14 THWN stranded wire, mois ture and heat resistant. Lead-in cable shall conform to the detector manufac turer's recommendations. The wire shall be encapsulated in vinyl tubing over its entire leng th. No damage shall occur in the detector if the pavement loop or lead-in becomes short- circuited. 718.05 Microwave Detectors Microwave detectors shall work on an operational frequency of 10.525 GHZ. The detection method shall be microwa ve with adjustable patterns with a response time of 165 milliseconds and an adjust able hold time of 0.5 to 5 seconds. It shall be powered from 10 VAC to 24 VAC. All conta cts shall be form C, 5 amp rated. The detector shall have a fail-safe microprocessor circ uit so that if the unit fails it will place the controller in recall on the apparent phase. 718.06 Pedestrian Detectors Pedestrian push button detectors shall be weatherproof and constructed to eliminate the possibility of electrical shoc k in all weather conditions. The pedestrian push button switch shall be a phenolic enclosed precision snap-acting type, switching unit, single-pol e, double-throw, with screw typ e terminals, rated 15 amperes at 125 volts, AC and shall have the following characteristics:
a.The switching unit shall have a stainless steel plunger act uator and shall be provided with U-frame to permit recessed mounting in push button housing .
b.Where a pedestrian push button is attached to a pole, the h ousing shall be shaped to fit the curvature of the pole and secured to provide a rigid in stallation. When required, saddles shall be provided to make a neat fit. 7-62 718.07 Controllers All controllers shall be rack-mounted, so lid state, menu driven, keyboard units conforming to the ATC 5201 v06.25 Advanc ed Transportation Controller (ATC) Standard. The controller shall be supplied wit h all necessary interfaces needed to support Advanced Transportation Controller Cabinet (A TCC) / Serial Interface Unit (SIU) communications. Controllers shall be supplied with a n internal real-time clock/calendar capable of daily, weekly, and yearly events time programming. The controller shall be designed and supplied to provide the number of phases and sequencing as shown on the plans without any auxiliary equipment. Traffic signal controllers shall be supplied as follows: • Contain ATC API operational software conforming to ATC 5401 S tandard v02. • Be configured to operate in an ATCC 5301 v02 cabinet platform . • Be supplied with the appropriate version of the Linux operati ng system, Board Support Package (BSP) and internal processing levels necessary to support connected vehicle (CV) as well as local and system operations. • Shall be fully compliant with NTCIP 1201 and 1202 standards. • Include a minimum of 3 High Speed USB 2.0 ports. • Include a minimum of 3 10/100BaseT, RJ45 Ethernet connector p orts. • Meet the functional requirements of the NEMA TS-2, 2016 Stand ard, including all amendments. • Support Flashing Yellow Arrow (FYA) and Flashing Red Arrow (F RA) operation with the ability to provide a minimum of 6 flashing pairs. • Contain the ability to alter the controller unit’s internal d atabase using a built-in front panel keyboard, using a com puter connected to the control ler unit with a USB cable or an Ethernet cable, and remotely using the central mana gement system application. • Be supplied and installed with the ability to collect, store, and report various measures of effectiveness (MOE’s). • Shall collect and process all 255 high resolution enumeration s as defined in the report “Indiana Traffic Signal Hi Resolution Data Enumerations” , dated November 2012. This data will be processed in the controller and availab le via download from the controller USB Ethernet port or, if available, via system c ommunications. As a minimum, the controller will be set up to provide the following performance reports: - Approach delay - Preemption events - Transit Priority Events - Split Monitor - Approach Volumes - Purdue Coordination Diagrams - Arrivals on Red 7-63 - Arrivals on Green - Phase Termination - Pedestrian Delay • Be able to backup and restore Controller programing data to a USB memory device connected to the front of the c ontroller. No additional softwa re shall be required to perform this function. • Be able to upgrade the Controller firmware via USB memory dev ice connected to the front of the controller. No additional software shall be re quired to perform this function. The field electrical loading f or flash operation shall be wire d through the transfer relays such that the load on the 2-circuit flasher is as balanc ed as possible within the limitations of the signal phasing. Electrical filtering/surge protection shall be supplied and in stalled in each cabinet in accordance with ATCC 5301 v02 requirements and the manufacturer ’s recommendations. At a minimum, surge suppression shall be provided for incoming electric utility power conductors, all signal control circuits, vehicle detection, and pedestrian detection terminations. All equipment inputs, outputs, and terminals shall be identifi ed by the phase designations shown on the plans.. The reliability of the equipment shall be demonstrated by test performance detailed in 718.08 that will confirm that the controller unit, fully wir ed cabinet, and auxiliary equipment meet the operational and functional requirements of t he plans and specifications. Each traffic controller unit, flasher and all other current in terrupting devices shall be equipped with a suitable radio interference suppressor installe d at the input power point. Interference suppressors shall be designed to minimize interfer ence in both broadcast and aircraft frequencies. Suppressors shall be designed for 125 per cent of the total connected load and shall meet standards of the UL and the EIA. The type of controller, auxiliary equipment and other operatio nal features shall be as noted on the plans. All controllers shall be capable of providing flashing operati on of the signal lights, as indicated on the plans. Transfer from flashing operation or to flashing operation shall conform to the MUTCD. If noted on the plans, hardwire preempt circuits shall be prov ided for emergency vehicles and/or railroad crossings. The clearance and preempt i ndications shall be as noted on the plans. Preempt circuits shall function during stop and g o and flashing operation unless otherwise noted. The duration of clearance and preempt i ntervals shall be adjustable over the range noted on the plans and shall be labeled accordin g to function. The railroad 7-64 preempt circuit shall be designed to operate as a fail-safe loo p through a normally made contact on the railroad's control relay in the railroad's contr ol cabinet. Railroad preemption shall have precedence over all preemption intervals for other p urposes. Actuated vehicle phases and actuated pedestrian phases shall b e served in that interval of the cycle indicated on the plans. Time for an actua ted interval shall be taken from the non- actuated phase(s) as noted on the plans. Automatic transfer to or from flashing operation shall conform to the MUTCD. Manual advance of the intervals by use of hand cord control sha ll cause the controller to advance to the next programmed interval only upon pulse signal from the hand cord circuit, interval timing shall hold the interval for the minimum program med amber and red clearance intervals. The controller unit shall be enclosed in a sheet metal case wi th protective painted finish, designed to permit easy access to the interior and remo val of printed circuit boards and modules without the use of sp ecial tools. All program contr ols, fuses, and indicator lights shall be mounted on the front panel and shall be clearly and permanently labeled.. When on manual operation, all phases shall be called regardles s of vehicle detection and the controller shall be advanced upon pulse from the hand c ord circuit, except yellow and red clearance intervals shall be timed for the duration pro grammed. An exclusive pedestrian phase shall not extend or recycle until a vehicle phase has been serviced. When on manual operation, all phases shall be called regardless of vehicle detection and the controller shall be advanced upon pulse from the hand cord circuit except yellow and red clearance intervals shall be timed for the durat ion programmed. Automatic transfer from or to flashing operation shall conform to the MUT CD. Pedestrian phases shall not be extended by actuations, during t he walk or clearance interval. Actuations during the clearance intervals shall be p laced in memory. Each controller supplied shall be the same manufacturer, model and contain the same firmware level and version number. 718.08 Controller Cabinet The traffic signal control equ ipment shall be enclosed within a dust and moisture-proof aluminum housing with an auxil iary door in door feature. The door hinge pins shall be made of stainless steel. There are two cabinet configuration options that are specified for use; a ground mounted cabinet an d a pole mounted cabinet. All new controller cabinets, traffic signal or lighting, shall be configured to eliminate arc flash. All electrical equipment will be dead front, no open terminals, busbars, breakers, or exposed terminal strips. The cabinet shall be designed, cons tructed and installed with all necessary provisions to comply wit h the latest NFPA 70E require ments. All electrically live parts over 50 volts shall be covered with Lexan or a suitable p hysical barrier to eliminate the possibility of an arc flash. 7-65 The ground mounted cabinet shall be a NEMA “P” size cabinet (4 4”W x 26”D x 67”H). The cabinet shall be supplied with two side by side, 19” rack cages which shall extend from the bottom to the top of the cabinet. The cabinet s hall be supplied with four doors; two on the front face a nd two on the back face. Each doo r shall open independently with an independent center post latching for each of the four d oors. The cabinet front provides for user interface to the in-cabinet equipment includi ng the front panel of the controller, the cabinet status displays and detection system co ntrol interface. The cabinet rear provides access for cable termination and shall only be ac cessed for installation and for cabinet troubleshooting. The left-side rack of the cabinet rela tive to facing the cabinet from the front, to be referred to as the ‘Control’ side, shall house the control devices such as the controller, Cabinet Monitor Unit (CMU) and Auxiliary Display Un it (ADU), switch packs and power distribution panel. As such, this rack shall be refer red to as the “Control” side of the cabinet. The right-side rack of the cabinet relative to fac ing the cabinet from the front, to be referred to as the ‘Power and Auxiliary’ side, shall house t he spare card cage assembly and battery back-up devices and communications elements. The gr ound mounted cabinet shall be supplied with 32 output channels and 48 input channels . The pole mounted cabinet shall be a Model 336S cabinet (24” W x 20” D x 46” H). The cabinet shall be supplied with a 19” rack cage which shall extend from the bottom to the top of the cabinet. The cabinet shall be supplied with two door s; one on the front face and one on the back face. The cabinet f ront provides for user inter face to the in-cabinet devices including the front panel of the controller, the cabinet status displays and detection system control interface. The cabinet rear provides access for cable t ermination and shall only be accessed for installation and for cabinet troubleshooting. The pole mounted cabinet shall be supplied with 16 output channels and 24 input channels. Both the ground mount and pole mount cabinets shall be configu red to provide the following output/input channel assignments: Channel Input Output
1-8 Vehicle Phase Call 1-8 Vehicle Phase 1-8
9-12 Pedestrian Phase Call 2,4,6,8 Pedestrian Phase 2,4,6,8
13-16 Overlap A, B, C, D
17+ Special Functions - The ground mount cabinet shall be supplied with a spare equipm ent card cage assembly. This card cage assembly shall not be wired to any cab inet device, but rather used to store spare rack mounted cabinet devices such as switch pack s, serial interface units (SIUs), CMUs and phase selectors. This spare rack assembly shal l be located at the top of the Power and Auxiliary rack. 7-66 The cabinet shall be supplied with a global positioning system (GPS) antenna to provide an accurate time reference for the cabinet. The antenna shall be mounted at the top of the cabinet in the back-left corner of the enclosure. The an tenna shall be mounted such that it provides a waterproof seal; eliminating any possibility for water penetration into the cabinet. The GPS system cable shall be connected and integrated into the controller. The cabinet shall be supplied with a police door panel located in the middle area of the front door for both cabinet types. The switches shall be mo unted in the police panel and labelled as to function. Four switches shall be supplied as fol lows:
1.Power On/Off 2. Signal On/Off 3. Signal/Flash 4. Manual/Auto with cord The manual control cord shall be a coiled type, sealed we ather proof covered hand switch extending to six feet when f ully stretched. The cord sha ll be fastened to the cabinet via a compression type connector to provide strain relief for t he cord’s electrical connections. The police door panel shall be of sufficient size so as to store the manual control cord when panel door is closed. The cabinet shall be supplied with a technician’s panel mounte d on the back of the police panel. This panel shall be supplied with the following s witches:
1.Controller On/Off 2. Flash/Auto (Allows the controller to cycle while flashing) 3. Signals On/Off (Allows the controller to cycle with signal d isplays being dark)
4.Stop Time Normal/On (Provides the ability to manually activa te a controller stop time input) The cabinet shall be supplied with white LED light panels whic h shall automatically illuminate via a door open switch whenever one of the four main cabinet doors are opened for the ground mount cabinet or two main doors for the pole cab inet. The LED panels shall produce a minimum of 1,000 lumens on the Control side of the ca binet and 1,000 lumens on the Power/Auxiliary side of the cabinet and be protected by a c lear shatterproof shield. The ground mount cabinet shall contain four light panels; two at th e top of each rack assembly and two at the bottom portion of each rack assembly. The pole m ounted cabinet shall contain two light panels; one at the top of the rack assembly a nd one at the bottom rack assembly. A second door open status switch per door shall activ ate a controller input to log a report event that one of the doors was opened. All door open st atus switches shall be connected to the same controller input. For the ground mount ca binet, there shall be two switches on each of the four main doors. For the pole mount cab inet, there shall be two switches on each of the two main doors. 7-67 All cabinets shall be provided with a thermostatically control led ventilating fan and throwaway glass fiber air filters. The electric fan shall have ball or roller bearings and shall have a capacity of 100 ft³ per minute. The fans shall be rated for continuous duty with a minimum service life of 3 years. The fan blades shall be suppli ed with a safety screen to prevent accident contact with the blades. The ventilating syste m shall be designed to prevent the entrance of rain, snow, dust, and insects. The fan and vent s shall be arranged in such a manner that the air intake is at the cabinet bottom and the exh aust is at the cabinet top. The air intake shall be rain tight and covered with a removable fil ter. There shall be vents at the bottom of both front doors for a ground mount cabinet and a ven t at the bottom of the single front door for the pole mount cabinets. The removable air filte r shall be firmly held in place such that cracks and openings are eliminated to ensure that all air is filtered. The ground mounted cabinet shall contain two fans while the pole mounted c abinet shall contain one fan. The thermostat shall be m ounted on the top interior of the cabinet and user adjustable to allow for temperature settings from a minimum of 70°F to 140°F and capable of activating the fans within plus or minus five degrees of the set temperatu re. The intake vent shall be rain tight and located on the bottom half of the cabinet, cover ed with a removable air filter. There shall be two intake ve nts provided with the ground mount cabinet and one intake vent supplied with the pole mount cabinet. The cabinet shall contain a pull-out drawer, 19” wide with suf ficient strength to hold a laptop computer. The top of the drawer shall be covered with a non-conductive, non-skid material and hinged such that a storage space is available to s tore cabinet documentation or small parts. The pull-out shelf shall be located in the rack sp ace directly under the controller unit. The back of the control side front door shall contain a r esealable, heavy-duty opaque plastic envelope with two gromme ts that provide mounting to two integrated hooks installed on the back side of the front cabinet door. The heavy-duty plas tic envelope will be used to store cabinet wiring diagrams and operations manuals that canno t be accommodated in the pull-out draw storage tray. The pole cabinet shall accommodate all control equipment inclu ding temperature control equipment. It shall be designed to be attached to the t ype of pole indicated in the contract plans. If the controller cabinet is to be ground mount ed, details of the installation will be shown on the plans. Piano type hinges on cabinet doors shall be fabricated of stainless steel with a stainless-steel hinge pin. The cabinet s hall be supplied with reinforcing plates where the cabinet is supported by the pole hangers. The ground mounted cabinet shall be supplied with a 6” minimum high riser aluminum base that elevates the cabinet above the cabinet found ation. All manual control switches, push button control, flashing swi tch, signal switch and any other specified switches shall be located to be accessible within the outside door, without exposing the controller mechanism. The cabinet shall be supplied with detector test switch panel. This panel shall be rack mounted and located above the controller. There shall be a tota l of 12 switches to allow for the manual placement of detector calls into the controller. Eac h switch shall be clearly 7-68 labelled as to input channel and function. Each switch position shall correspond to the same controller input; switch one is for controller input channel on e, switch two is for controller input channel 2, etc. Switches 1-8 shall correspond to phase 1- 8 vehicle calls. Switches 9-12 shall correspond to pedestrian calls 2, 4, 6 and 8. The switch labels shall define the corresponding vehicle or pedestrian phase called and switch pos ition function. Detector switches shall be three position and function as follows: - Up Position = Provides a constant call - Center Position = Normal operation (Phase receives call from detectors) - Down Position = Provides a momentary call The cabinet shall be supplied with a laminated door sticker. T his sticker shall be permanently affixed to the insid e front control side of the cab inet door for the ground mount cabinet and the inside front side of the pole mount cabinets. A t a minimum, the sticker shall contain the following information: • Vehicle detection informati on including detector channel assi gnment, phase assigned, approach and cabinet termination points. • If applicable, network communications information for all in- cabinet devices. This includes IP addresses, subnet mask and MAC addres s. • Per approach preemption information including channel, approach/direction and termination points. • Field termination chart showing per approach/per phase number ing of all signal circuits. • Signal phasing and signal plan w ith intersection geometry and signal head designations. The locks for the switch compartment door of the cabinet shall unlock with a skeleton style (#1) key. The locks for the main doors of the ca binet shall unlock with a Corbin #2 key. Two sets of two keys (main door/switch door) sha ll be furnished with each cabinet. The cabinet shall be supplied with a permanent label mounted o n the upper portion of the inside front main door whi ch contains the name of the ca binet manufacturer, controller manufacturer, model/part number and year/month of as sembly. All traffic signal controller cabinets shall be supplied with a GFCI duplex outlet, as well as a multi-outlet strip. The cabinet shall be supplied with a generator panel. The gene rator panel shall consist of a manual transfer switch and a twist-lock connector for generator hookup. The transfer switch knob and twist-lock connector shall be located inside a generator access panel with a separate lockable door mounted on the lower left, exterior of the control side wall of the ground mount cabinet a nd on the lower left side of the pole mounted cabinet. The 7-69 door shall be equipped tamper resistant hinge. The generator pa nel assembly shall be housed in a heavy-duty, vandal resistant, weatherproof, dustproof encl osure designed for exterior applications. The generator access panel door shall have a move able plate to cover an opening for the generator cable. The connection to an external generator shall be a waterproof, secure connection. The connection shall allow autho rized personnel; to access, connect and secure an external electrical source to the cabinet for power restoration. The generator panel door shall contain a weather proof seal and sup plied with a lock accessed with a skeleton style (#1) key. The ground mounted cabinet shall be supplied and installed wit h an electric service meter socket trim and electrical service disconnect switch moun ted on the exterior, Power and Auxiliary side of the cabinet. The meter and disconnect swi tch shall be installed centered on the side of the cabinet without doors such that it is not less than 48 inches nor more than 60 inches above final grade. The Contractor shall coo rdinate with the local electric utility company to determine the appropriate type of e lectric service meter socket trim and electrical conductors to be used. The line side cable shall be routed external to the cabinet from the ground to a 50 amp disconnect switch, then con tinuing to the bottom of the electric service meter socket trim, all through rigid steel con duit furnished and installed by the Contractor. The load side cable shall be routed through the cabinet and terminated on the line side of the main cabinet circuit breaker. The cable shall be routed through the interior of the cabinet such that it does not block or enter into available rack space. (removed: thus preventing that space from being used either by equipment suppl ied as part of the project, or future equipment that would be installed in the rack system. J oe indicated that he would add this language to the detail so it is covered.) The cable shall be routed between the edge of the rack system and the cabinet side wall, along the bottom of the cabinet and below the bottom opening of the doors. Care shall be taken by the Contrac tor when installing the electric service meter socket trim and electrical service disco nnect switch so that there is no damage inflicted on installed devices or the rack system during the installation. All metal shavings produced during the drilling of the access hole for th e electric service shall be removed from the cabinet interior by the Contractor. The Contra ctor shall install appropriate bushings to all cabinet penetrations. Pole mounted cabinets wil l require an electric service meter and disconnect switch system to be installed as indicated in the Plans or as directed by the Resident and approved by the local electric utility company . Line side cable shall be installed in a rigid steel conduit, flexible liquid tight condu it or PVC Schedule 80 conduit from the meter and disconnect to the underside of the pole moun ted cabinet. All wiring shall comply with all applicable local electrical codes as well as th e National Electric Code. The cabinet main doors shall be provided with a stop to limit door opening to both 90° and 180° ±10°. The door stop bar shall be a captive type me chanism that serves to keep the bar in contact with the cabinet at both stop bar ends and p rovided with a catch that can be operated when the door reaches these 2 positions and will ho ld the door open securely until released. The cabinet shall be supplied with a three-poin t draw roller latching system consisting of the following latching points: - Center of the cabinet (lock) - Top of the cabinet – controlled by door handle 7-70 - Bottom of the cabinet – controlled by door handle The latching points on the top and bottom of the cabinet door shall remain in the locked position until the door lock is disengaged. The locking mechanism shall be equipped with nylon rollers to secure the top and bottom of the door. The cabinet shall be supplied with a ¾” diameter shank, stainl ess steel latching handle for each door. The latching handle shall have a provisio n for padlocking the door in a closed position. Controller cabinets designated on the plans to be ground mount ed shall have a pliable seal composed of caulking compound or mastic placed bet ween the cabinet base and the concrete foundation to prevent dust and dirt from entering the cabinet. A Cabinet Monitor Unit (CMU) a nd Auxiliary Display Unit (ADU) shall be supplied and installed in each cabinet. The CMU and ADU shall conform to requirements defined in the Advanced Transportation Controller Cabinet (ATCC) 5301 v02 standard. The CMU/ADU units supplied and installed as part of this project sh all support 32 channels. All configuration programming shall be resident in a non-volatile D atakey device. Each CMU shall be supplied with a Datakey programmer and associated soft ware. The Datakey programming software shall include a set-up wizard which shall assist the user with the initial set up of the device. The Contractor shall program the Datakey with data entries appropriate for each intersection. All programing resident on t he Datakey shall be included in the hardcopy. The Contractor shall reconfigure the default user name and pas swords on all communications / control equipment within the ATC Controller an d Cabinet. This includes but is not limited to the ATC traffic controller, ATC ancillary equipment, video detection equipment, Ethernet switches, and routers. The new user name and passwords shall be created in coordination with the M aineDOT IT staff and or as di rected by the engineer; no manufacture default level passwords shall be allowed. The Contr actor shall utilize network communications encryption settings on all forms of wired Ethern et data paths. No “in the clear” communications shall be allowed. At a minimum all wired Ethernet connections shall meet 802.1AE standards. The Contractor shall supply and configu re a Cyber Intrusion and Prevention Device (CIPD) in each A TC cabinet. The CIPD shall p revent any unauthorized access / connections to the traffic control system. Upon detec tion of unauthorized attempts, the CIPD shall notify the agency via SMS message and or email a nd log the event. The CIPD shall be installed prior to any remote access device. The Contractor shall coordinate with the agencies Information Technology and Operational Techno logy (IT/OT) staff and or the engineer for finale confi guration of the CIPD. No direct ac cess to the traffic system shall be allowed without the installation of a CIPD and or Router/Fir ewall. A cabinet power supply shall be supplied with each cabinet. Th e cabinet power supply shall comply with ATCC 5301 v02 (EDI Model 2216-2412-HV or equivalent). 7-71 A full complement of switch packs shall be supplied with each cabinet. Switch packs shall comply with ATCC 5301 v02. A full complement of flashers shall be supplied with each cabi net. Flashers shall comply with ATCC 5301 v02. A full complement of SIUs sha ll be supplied with each cabinet. The Serial Interface Units (SIU) shall comply with ATCC 5301 v02. A full complement of flash transfer relays shall be supplied w ith each cabinet. Flash transfer relays shall comply with ATCC 5301 v02. In addition to the full complement of switch packs, flashers, SIU’s and flash transfers relays, two additional SIU’s shall be supplied. All s pare equipment required to be supplied with the ground mounted cabinet shall be store in the spare equipment rack. Spare equipment required to be supplied with the pole cabinet shall b e delivered to MaineDOT. The field electrical loading f or flash operation shall be wire d through the transfer relays such that the load on the 2-circuit flasher is as balanc ed as possible within the limitations of the signal phasing. Electrical filtering/surge protection shall be supplied and in stalled in each cabinet in accordance with ATCC 5301 v02 requirements and the manufacturer ’s recommendations. At a minimum, surge suppression shall be provided for incoming electric utility power conductors, all signal control circuits, vehicle detection, ped estrian detection, communications and preemption system terminations. Three copies of the database programming for all in cabinet de vices shall be provided with each cabinet. The database programming sheets sha ll reflect as-built programming resident in each unit at the time of acceptance. The cabinet monitor unit shall be connected to the field termi nals of the signal light circuit to provide protection against conflicting green, yellow or walk indications being simultaneously energized as a result of controller failure, rel ay or solid-state switch failure, short circuited field wiring or other failures. When a conflict is detected, the cabinet monitor unit shall ca use the signal system to commence flashing operation; energize the stop-timing circuit o f the controller while controller power shall remain on; lock-in flashing operation un til manual actuation of the momentary contact reset push button resident on the cabinet mon itor unit. The cabinet shall be equipped with a thermostatically controll er fan; two fans shall be supplied and installed for the ground mount cabinet and one fan shall be supplied and installed for the pole mounted cabinet. The fans shall be rated for continuous duty with a minimum service life of 3 years. The fan blades shall be suppli ed with a safety screen to prevent accident contact with the blades. 7-72 The cabinet shall be supplied with a GFI outlet to be installe d on the upper left, exterior of the control side wall of the ground mount cabinet a nd the upper left side of the pole cabinet. The electrical outlet will be GRCI protected, hou se in a locked access enclosure. The GFI outlet shall be supplied via its own 15-amp circuit breaker. The GFI outlet assembly shall be housed in a heavy-duty vandal resistan t, weatherproof, dustproof enclosure designed for exterior applications. The GFI enclosure door shall contain a weather proof seal and supplied with a lock accessed with a skeleton st yle (#1) key. The main cabinet circuit breaker shall be rated at 30 amps. Ci rcuit breakers shall be approved and listed by the UL. The operating mechanism shall be enclosed and shall be trip- free from operating handle under load and shall be trip-indicat ing. All circuit breakers shall be quick-make, quick-break on either automatic or manual operat ion. Contacts shall be silver alloy enclosed in an arc quenching chamber. Overload tri pping of breakers shall not be influenced by an ambient temperature range of from 0 to +158 °F. The testing process is required to ensure that the controller and cabinet assembly perform properly and meet all requirements described and requir ed as part of this project have been met. This includes testing of all hardware and all so ftware supplied and installed as part of this project. All tests shall be conducted in accor dance with the approved test procedures developed by the Contr actor. The Contractor shall su bmit test procedures and forms/checklists for review and approval to the Engineer. All components of the controller and cabinet shall be bench te sted for a minimum of 72 continuous hours by the Contractor at the Contractor’s facil ity prior to delivery to the project. Testing shall be perfor med by an IMSA, level 3 (Field or Bench) Certified Signal Technician using a test board a nd in conformance with the desig n loads, phasing, timing and auxiliary equipment such as pre- emption. Upon completion of sa tisfactory bench testing, a written approval will be supplied to the Contractor by the Engi neer. This approval does not relieve the Contractor from ensuring proper operation of the eq uipment. The approval shall accompany the cabinet and controller when delivered to the proj ect. At a minimum, the test plan developed by the Contractor shall contain the following sampling of test items:
a.Installation of all the equipment into the cabinet as requi red per the plans and specifications.
b.Setting of the phase timings of the controller in accordanc e with plans.
c.Checking all of the wiring connections for physical tightne ss.
d.Observing the sequences, timings and operations of the cont roller to verify conformance to the plans and specifications.
e.Test the police panel switches installed in the panel. 7-73
f.Test Pre-emption and/or Priority operation - Optical Detect or - with the receivers wired in the cabinet and using an emitter, test each pre-emptio n or priority run as per the plans. Hard Wired - Attach a temporary push button as p er the plans and test each pre-emption or priority run as per the plans.
g.Check exhaust fan controls by applying heat from a 100-watt lamp on an extension cord to the thermostat.
h.Check heat lamp controls by cooling the thermostat. (i) Check cabinet monitor unit by testing for any conflicting G reens or Yellows by the use of a jumper wire attached to a displayed Green or Yello w and to the other non-parent Greens or Yellows to ascertain that conflicting colo rs are not present. Test all possible combinations of conflicting displays. Upon completion of the project, a print out of the databases c ontained in the controller, CMU, Preemption, Video Detection or any other equip ment shall be provided to the Engineer. The databases shall be provided either via a hard copy printout or on a “thumb drive.” Tests shall be conducted by the Contractor, witnessed by the E ngineer, at the Contractor’s facility. The test facility shall be located in th e State of Maine and be clean, heated/air conditioned and have provisions for the simultaneous testing of at least three (3) controller and cabinet assemblies. The controller and cabinet a ssembly shall be wired and programmed to provide the signal phasing, timing and operations shown on the design plans for that particular location. A test light board and a manual d etector call panel shall be connected to each cabinet assembly to verify display outputs an d vehicle/pedestrian input calls. This test plan, when approved and executed, must demonstrate t hat the controller and cabinet assembly meet all of the requirements contained in the project Plans and Specifications. The Contractor shall propose testing plans and submit the test plan(s) and procedures as detailed herein to the Resident and Design Engineers for app roval prior to testing. Each of the test plans shall contain the following elements: • Proposed date, time, and location of the testing • Names of the Contractor personnel who will be conducting the testing • Descriptive overview of the proposed test procedure • List of test equipment required to perform the testing • Test cases and test logging forms which detail every step of the test procedure: Test logging forms shall be presented in tabular format, with separate columns for each of the following: 7-74 • Test case description detailing the test step to be performed . • Expected result • Actual result • Pass/fail • Comments The Contractor shall supply separate test logging forms at the time of testing for each test plan, and for each device location. The test logging form s shall show the device location, date, and the start and end times of the test. At the end of each test logging form, there shall be signature and date locations for each of the following: • Contractor personnel conducting the test • MaineDOT representative witness • Engineer witness Signatures on the test logging form will signify only that the test was performed and witnessed, not that it passed or failed. The detailed Test Plans shall be submitted to the Engineer no later than thirty (30) days prior to the beginning of each test phase. The Contractor shall have approved test plans prior to submitt ing a request to schedule the start of any test activities. The Contractor shall notify the Engineer no less than fourteen (14) days prior to t he beginning of any equipment or s ystems testing. Testing shall provide verification and documentation that all requirements included in the Contract Documents are met. The Test Plans shall be deve loped by the Contractor to provide a mechanism that ensures that all contract requirements have been tested fully and verified. If any deviations or changes to the approved Test Plans arise, it shall be resubmitted by the Contractor for review a nd approval by the Engineer at le ast fourteen (14) calendar days prior to any planned test activity stage. No tests shall b e conducted until the Engineer have approved the test plan. A summary of all tests shall be produced at the completion of each testing phase of the project to ensure that all requirements defined by the syst em are satisfied. MaineDOT reserves the right to examine and test or retest any or all materials furnished by the Contractor for the project to determine if the y meet the requirements specified within the Contract Documents. 7-75 If MaineDOT decides that any material used in the construction of this project is defective or otherwise unsuitable, and the workmanship does not conform to the requirements of this Contract, the Contractor shall replace suc h defective parts and material at no cost to the Project. The times and dates of the tests shall be approved by the Engi neer. The Contractor shall conduct all tests in the presence of the Engineer. Testin g shall take place only on weekdays, which are official w orking days, unless the Engineer allows the test to be conducted and/or continued on weekends and non-working days. Th e Contractor shall make a request in writing at least fourteen (14) days prior to the p roposed testing, and schedule tests only if permission is granted by MaineDOT in writing. The Contractor shall be responsible for the conduct and docume ntation of the results of these tests that will be countersigned by the Engineers at t he end of each test. The signature of the Engineer implies only proof of presence. Test results shall be packaged and submitted to the Engineer within one week of test completion. No test phase shall begin until all prior test phases have been completed, and test resul ts have been approved by the Engineer. The Contractor shall utilize vendor supplied or any test speci fic software for testing, as needed, at no additional cost. 718.09 Flasher The flasher shall be a two circuit solid state device with no contact points or moving parts, producing between 50 and 60 flashes per minute with a 50 percent to 67 percent duty cycle. The flasher mechanism shall be mounted on a plug-in base with a plug-in mounting. The flasher relay shall energize the flasher and transfer signal light circuits from the controller un it to the flasher. The flasher shall be capable of breaking and carrying 10 amps on each circuit at 125 volts. All amber indic ations shall be on one circuit and all red indications shall be on the other circuit. The fla sher shall be protected from lightning damage by a device intended for use with solid state equipment. The flashing mechanism shall be independent of the controller unit and shall remain in operation upon shutdown of the controller or removal of the controller unit fr om the cabinet. The pedestrian indications shall be flashed with a separate solid-state flashe r. 718.10 Program Selection The weekly program selection unit sha ll be capable of automatically supervising the operation of cycle 1, cycle 2, cy cle 3, split 1, split 2, split 3, reset 1, reset 2, reset 3, and flashing operation. The weekly program selection unit shall allow selection and/or omission of these functions to be varied on a daily basis. The weekly program selection unit shall enable function transfers to be ma de as often as 15 minutes. Solid state devices used to automatically select dial, reset a nd flashing modes shall meet the applicable functional requirements of mechanical devic es. They shall maintain the preset program during power interruption and shall continue tim ing functions using a reserve power source. 7-76 718.11 Contacts and Relays All contacts used in connection wi th interval indications shall be of pure coin silver or its equivalent and shall be capable of breaking and carrying at least 15 amperes at 120 volts AC. The Contractor i s directed to arrange the internal wiring and number of circuits so that the contact rati ng is not exceeded. All actuated controllers shall be equipped with external type signal light relays. Relays shall not be used in connection with any automatic non- flashing red, yellow or green indication in installations having pre-timed electro-m echanical equipment, without the approval of the Resident. Relays shall be designed for continuous duty. Relays shall be designed to operate at ambient temperatures from -30°F to +158°F. Each relay shall be mounted on a plug-in base with a plug-in m ounting. Coils shall have a power consumption of 10 volt-amperes maximum and shall b e designed for continuous duty on 120 volts, AC. A leakage resistor, which shall permit current to pass through the relay coil if the contacts should remain closed after the coil circuit is opened, shall be installed with each external signal light relay to overcome residual magnetism effe cts. All relays shall be of a rating sufficient to carry the electr ical loads imposed upon them. A sufficient number shall be provided so that the total load is distributed among the various circuits in such a manner that the rating of each relay is 150 percent of the load. The monitor unit shall be connected to the field terminals of the signal light circuit to provide protection against conflicting green, yellow or walk in dications being simultaneously energized as a result of controller failure, rel ay or solid state switch failure, short circuited field wiring or other failures. When a conflict is detected, the monitor unit shall cause the s ignal system to commence flashing operation; energize the stop-timing circuit of the con troller while controller power shall remain on; lock-in flashing operation until manual actuat ion of the momentary contact reset push button; remove power from the signal light circuit; disable all functions of the "Flash-Automatic" and "Automatic Manual" switches in the police panel. Each circuit of the solid state switching devices shall have a minimum rating of 1,000 watts for tungsten lamp load at 120 volts, AC. The solid state switching devices shall be plug- in mounted to a base. Solid state switching devices s hall be protected from transient voltages and lightning by components especially desig ned for use with solid state devices. Circuit breakers shall be approved and listed by the UL. The operating mechanism shall be enclosed and shall be trip-free from operating handle under load and shall be trip- indicating. All circuit breakers shall be quick-make, quick-br eak on either automatic or 7-77 manual operation. Contacts shall be silver alloy enclosed in an arc quenching chamber. Overload tripping of breakers shall not be influenced by an amb ient temperature range of from 0 to +158°F. 718.12 Conductors The number and size of conductors required in each cable is indicated on the plans. All conductors shall be stranded coppe r conductors. Multiconductor cables shall conform to the latest revisions of IMSA Specificat ion Number 19-1 or 20-1. The service ground rod shall be 8 foot by ⅝ inch copperclad rod . The service wiring shall be single conductor number 6 AWG THW stranded copper black insulated and number 6 AWG THW stranded copper white insu lated rated 600 volts. All circuits for the timer and each auxiliary control unit sha ll terminate in a multiple contact connector. Conductors shall be attached to all pins of the connector and cabled. Conductors of the cable, except spares, shall be fitted with te rminal ends compatible with the terminal block and shall have identifying bands. The ends of all spare conductors shall be taped. SECTION 719 - SIGNING MATERIAL 719.01 Reflective Sheeting The reflective sheeting shall cons ist of a retro-reflective lens system having a smooth outer surface. The sheeting shall have a precoated adhesive on the back side, protected by an easily removable liner. The reflective sheeting and its components shall be NTPEP test ed and conform to all the requirements of FHWA ASTM D4956, Standard Specification for Retroreflective Sheeting for Traffic Control, i ncluding supplementary requireme nts. Engineering grade reflective sheeting shall meet the reflective intensity require ments of ASTM D4956, Standard Specification for Retro reflective Sheeting for Traffic Control, including supplementary requirements Type II sheeting. High intensity pr ismatic reflective sheeting shall meet the reflective requirements for ASTM D4956 Type III prismatic sheeting. Reflective sheeting, used in sign construction, shall be from the Department’s Qualified Products List and have been manufactured within the s ix months immediately prior to fabrication of each sign. Upon delivery at the job si te of each shipment of signs, a letter of certification shall be provided by the Contractor tha t the reflective sheeting conforms to the requirements contained herein. Super high intensity fluorescent retro-reflective sheeting, AST M D 4956 - Type VIII, or Type IX (prismatic), is required for all construction signs. Example Table Engineering Grade Type II High Intensity Type III
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 762–782 of 817.