1179 All LED indications shall have a permanent indelible sticker affixed to the back of the module indicating month a nd year of initia l installation. 680 All LED indications provided shall be individually listed on a parts list indicating the contract number, vendor, category, manufacturer, model, serial number, and inventory number. Hard copy and electronic copies shall be provided. The electronic document format and the blank worksheet shall be obtained from the Department’s Traffic Management Division.
2.Incandescent Signal Indications All new traffic signal and flasher installations that include new indications shall be fitted with LED’s. The minimum design requirements for replacement incandescent 690 light bulbs used in a traffic signal face shall be in accordance with the Institute of Transportation Engineers standard for traffic signal bulbs.
d.Wiring The field wiring leads shall be terminat ed with screw spade lug type connectors. The LED module wiring leads shall be terminated with 1/4 in. female type connectors for ease of connection to the terminal block.
e.Section Coupling Any method to connect two or more sections together may be used, if the 700 following requirements are met: 1. Two or more sections, when jointed together, shall maintain structural integrity wh en loaded in accordance with Institute of Transportation Engineers Standards.
2.The opening between joined sections shall accommodate two 1/2 in. cables.
3.The maximum length of bolts used to connect sections together 710 shall be 4 in. Nuts, bolts, and lock washers shall be hot-dip galvanized in accordance with ASTM A153 or be mechanically galvanized and be in accordance with the coating thickness, adherence, and quality re quirements of ASTM B695, class 55.
f.Terminal Block The center section of the three-section signal head, both center sections of the four-section head, one section of the two-section signal head, and each one-section signal head shall be equipped with a five-position terminal block for termination of 720 field wiring. Each section shall have provisions for two five-position terminal blocks. Each terminal screw shall have a 1/4 in. co rresponding spade tab. The terminal block shall have a minimum spacing between screw connections of 1/2 in. The height of the 922.03 1180 insulating ridge between screw connections shall be a minimum of 19/32 in. from the base of the terminal blocks.
g.Material Requirements 1. Polycarbonate Signal Head The housing, door, and visor of the section shall be made of ultraviolet and heat 730 stabilized polycarbonate. The black color shall be permanently molded into the components.
2.Die-Cast Aluminum Signal Head The housing, door, and visor of the section shall be made of a die-cast, corrosion resistant, copper free, non-ferrous me tal which shall be in accordance with ASTM B85. All surfaces of the housing, doors, and visor shall be shop painted or powder coated. The finish shall be nonreflecting flat black, color No. 37038, in accordance with SAE-AMS-STD-595. 740
h.Signal Backplates The traffic signal backplate shall be on e piece and made of sheet aluminum. The sheet aluminum shall have a nominal thickn ess of 0.063 in. and shall be according to ASTM B209, alloy 5052. The backplate shall be designed to be attached to a signal face without interfering with the opening and closing of th e traffic signal door. It shall be rectangular in shape with round corners and shall be of such dimensions as to give an exposed margin of 5 in. on each side. The backplate shall have a 2 in. wide yellow retroreflective strip applied to the outside perimeter of the backplate. The sh eeting shall be Type IV in accordance with 750 919.01(b) and applied in the orientation for the maximum angularity according to the manufacturer’s recommendations. The aluminum backplates shall be shop painted or powder coated. The finish shall be nonreflecting flat black, color No. 37038, in accordance with SAE-AMS-STD-595.
i.Certification A material certification shall accompany each order certifying that a signal head from a normal production run within the past 12 months, passed the Institute of Transportation Engineers criteria for breaking strength and deflection. Deflection 760 testing is not required in the certification for polycarbonate signal heads.
922.04 Pedestrian Signal Components (a) Pedestrian Signal Head
A pedestrian signal shall be one section and rectangular in shape. The dimensions of each side may vary from 18 to 19 in., including the visor and the hinges. The signal shall contain two figures with two different colored messages. The first figure shall transmit an upraised hand symbol message, and the second figure shall transmit a 922.04 1181 walking person symbol message. All new installations including new pedestrian 770 indications shall use Light Emitting Diodes with countdown displays. All pedestrian LED indications shall be selected from the QPL of Traffic Signal and ITS Devices. The pedestrian signal shall be in accordance with the standard of the Institute of Transportation Engineers for Pedestrian Traffic Control Signal Indications. 1. Housing, Door, and Visor The housing shall be equipped with mounting device hardware, such as a clamshell, with round openings at the top and bottom for mounting with brackets made of iron pipe standard, to fit the 1 1/2 in. pipe. The round openings shall have a common vertical centerline through the housing to allow for rotation. The round openings shall 780 have a serrated ring, with 72 serrations, which enables locking of the housing in 5° increments. The brackets or the clamshell shall serve as the electrical conduit for the pedestrian signal. The housing shall be black and made of die-cast, corrosion resistant, copper free, non-ferrous metal which shall be in accordance with ASTM B85. The door on the front of the housing may be hinged from any side. The door shall be gasketed to maintain a weather-tight enclosure when secured to the housing. The door and the visor shall be made of the same material as the housing or of polycarbonate. All materials shall be clean , smooth, and free from flaws, cracks, blowholes, or other imperfections. 790 The polycarbonate components shall be black in color. The metal components shall be painted or powder coated. The finish shall be nonreflecting flat black, color No. 37038, in accordance with SAE-AMS-STD-595.
2.Message The upraised hand and walking person symbols shall each be a minimum of 11 in. in height. The width of the upraised hand symbol shall be a minimum of 7 in. The width of the walking person symbol shall be a minimum of 6 in. Message configuration, color, and size shall be in accordance with the standard of the Institute 800 of Traffic Engineers for Pedestrian Traffic Control Signal Indications. Each pedestrian signal shall be completely wired internally and ready for connection of the field wiring. A suitable terminal block for connection of the internal wiring and the incoming field wires to the pedestrian signal head shall be provided in the signal housing. The light source shall be designed and constructed so that if an electrical or mechanical failure occurs, the upraised hand and walking person symbols shall also remain dark. 810
b.Pedestrian Push-Button Pedestrian push-button assemblies shall meet the standards of the MUTCD and Americans with Disabilities Act, ADA. Pede strian push-button assemblies shall be vandal and weather resistant, be pressu re activated with mi nimal movement, and 922.04 1182 cannot be stuck in a closed or constant call position. A red la tching LED and audible tone shall be provided for confirmation of an actuation call. A Type D certification in accordance with 91 6 shall be provided for the pedestrian push-button. Such certification shall contain the contract number, manufacturer's 820 name, model name, supplier's name, location or intersection name, and for a Type APS pedestrian push button, the sound level measurement of the audible features of the device.
1.Housing The pedestrian push-button housing shall be constructed of cast aluminum, cast zinc alloy, or stainless steel and powder coated yellow, and furnished with suitable mounting hardware.
2.Latching LED 830 The normal state of the LED shall be off. When the push button is pressure activated, the LED shall be lighted and remain on until the beginning of the walk phase. The latching relay shall be mounted in the signal cabinet, controlling two pedestrian phases.
3.Actuator The actuator shall be stainless steel or aluminum with a minimum diameter of 2 in. and a solid state electronic Piezo switch rated for a minimum of 20 million cycles with no moving plunger or moving electrical contacts. The operating voltage shall be 12-24V. The actuator’s nominal operating force shall not exceed 5 lb. 840
4.Sign The pedestrian sign shall be the R10-3e in accordance with the MUTCD, unless a different MUTCD sign code is indicated on the plans. The sign base shall be sheet aluminum in accordance with 919.01(b).
5.Accessible Pedestrian Push Buttons When an APS is specified, the push-button shall have audible and tactile features. The push-button shall activate both the Walk interval and the APS. The color of the actuator shall contrast visually with the housing or mounting. A standard 850 manufacturer’s warranty shall be provided.
a.Audible Features The pedestrian push-button assembly shall include an audible indication of the Walk interval by either tone or voice and shall be audible from the near side of the associated crosswalk. If the tone for the Walk interval is the same as the locator tone of the push-button, it shall have a faster repe tition rate than the a ssociated locator tone. The volume of the audible features shall have automatic volume adjustment based on the ambient noise levels. Audible features shall be at least 2 dB but no more than 5 dB louder than ambient sound, up to a maximum volume of 89 dB measured at 36 in. from 860 922.04 1183 the device. Audible features may be integral to the pedestrian push-button assembly or through a separate speaker housing. When push buttons are separated by 10 ft or more, the audible indication shall be a tone. When push buttons are separated by less than 10 ft, the indication shall be a voice message. When voice messages are used, th ey shall include a cl ear message that the walk interval is in effect and shall indicate to which crossing it applies. The pedestrian push button shall have an audible locator tone feature. The locator tone shall have a duration of 0.15 seconds or less and shall repeat at 1 second intervals. b. Tactile Features The push button assembly shall incorpor ate a raised arrow. The arrow shall be raised 0.03125 in. minimum and shall be 1.5 in. minimum in length. The arrow color shall contrast with the background. The raised arrow shall vibrate to indicate that the walk interval is in effect. 922.05 Blank 880
922.06 Disconnect Hanger Junction Box Traffic signal disconnect hanger junction boxes shall consist of a span hanger, a balance adjuster, a disconnect hanger clevis, and a housing with a hinged door with a positive latching device. The span hanger, balance adjuster, and all related hardware
shall be hot-dip galvanized in accordan ce with ASTM A153 or be mechanically galvanized and conform to the coating thic kness, adherence, and quality requirements of ASTM B695, class 55. The housing shall be made of a die-cast, corrosion resistant, copper free, non-ferrous metal which shall be in accordance with ASTM B85. The balance adjuster fitting shall be made of ferrous or non-ferrous metal. When made of 890 ferrous metal it shall be galvanized in accordance with the re quirements for the components and related hardware as set out above. The disconnect hanger shall be designed so the maximum allowable space or play between the span hanger and the eye-bolt of the balance adjuster and between the balance adjuster and the disconnect hanger cl evis, at points where they are attached to each other by rivet pins or hex head bolts and nuts with lock washers, shall be 0.062 in. The span hanger bolt where the eye-bolt or the balance adjuster is attached shall be 5/8 in. diameter. 900 When serrated locking rings are not integrally cast in the components, the component and locking ring shall be designed so that when the lo cking ring is placed flush against the component, the component and locking ring shall not rotate or slide when torque is applied. The serrated components shall have 72 serrations to enable rotation of the disconnect hanger clevis, hub plate, or signal head in 5° increments. 922.06 1184 There shall be no thread in contact with a wearing surface. Locking rings shall be a minimum thickness of 3/16 in. and a maximum thickness of 1/4 in. from the base of the ring to the serration peaks. The inside diameter shall be 2 in. and the outside diameter shall be 2 7/8 in. 910 The terminal block shall have an 18-point terminal block permanently engraved or etched with sequential numbers indicating the circuits. The terminal block shall not have a method of connection which allows a screw point to damage wires when the wires are securely connected. Each point of connection shall accommodate a minimum of four No. 14 gauge wires. The disconnect hanger shall have two side entrance holes on opposite sides capable of receiving a 1 1/2 in. plastic or rubber insert to reduce water infiltration. It shall be capable of supporting signal faces in the ambient temperature range of -35 to 920 120°F without failure. The balance adjuster shall have hex head bolts, lock washers, and nuts for securing the main body of the balance adjuster firmly onto and around the eye-bolt to prevent any twisting or turning of the head suspe nded below it. The span hanger shall have two J-bolts, lock washers, and hex head nuts adequate in size to securely fasten the hanger to a messenger cable up to 1/2 in. in diameter. A Type C certification in accordance with 916 shall be provided for the disconnect hanger junction box. 930
922.07 Signal Support Assemblies
a.Clearance The maximum allowable space or play be tween the hanger assembly and the eye- bolt of the balance adjuster and between the balance adjuster and the weatherhead clevis, at points wher e they are attached to each other by rivet pins or hex head bolts and nuts with lock washers, shall be 0.062 in. No bushings or shims will be allowed in this assembly. 940
b.Balance Adjuster The balance adjuster shall consist of a hex head bolt, a lock washer, and nuts for securing the main body of the balance adjuster onto and around the threads of the eye- bolt to prevent any twisting or turning of the adjuster.
c.Span Hanger The span hanger, balance adjuster, weatherhead, and all related hardware shall be made of a non-corrosive metal or shall be hot-dip galvanized in accordance with ASTM A153 or be mechanically galvanized and conform to the coating thickness, adherence, and quality requirements of ASTM B695, class 55. The weatherhead shall 950 have a minimum of 2 1/2 in. of exposed threads. The weatherhead shall have two set screws to fasten the nipple to the weathe rhead. If the weatherhead and threaded pipe 922.07 1185 has a slip-in connection, the locking device shall be a double nut assembly. If the weatherhead and threaded pipe has a screw-in connection, the locking device shall be a double set screw assembly. The span hanger shall be furnished with two each of J-bolts, lock washers, and hex head nuts. The J-bolt shall be a minimum of 1/4 in. diameter and shall have sufficient threads to be able to secure the hanger to a 1/4 in. or to a 1/2 in. span cable. 960
d.Tether Bracket The tether bracket shall attach to a 1/4 in. tether and prevent the bottom of the head from moving side-to-side on the tether. Where backplates are installed on the signal heads, the tether bracket shall be of the proper length for the backplate so that the cable is mounted below the bottom of the backplate to avoid interference with head alignment and damage to the backplate. Three bolts, nuts, and washers shall be used to secure the tether bracket to a three-section or four-sec tion signal head. A wire rope clamp in accordance with 922.10(e)4c shall be used to secure the tether bracket to the tether. 970 The tether bracket shall have predrilled 1/2 in. diameter holes. In lieu of the wire rope clamp and 1/2 in. diameter holes, a beveled tether plate that completely fills in the extruded portion of the tether bracket may be used to secure the tether bracket to the tether. The tether bracket shall not extend more than 2 in. below the tether. (e) Pipe Arm Assemblies The multiple pipe arm assembly shall consist of a span hanger assembly, a balance adjuster, a signal weatherhead, a two, three, or four- way pipe arm, 1 1/2 in. pipe, a lower arm assembly, and all related hardwa re necessary for a complete assembly. The two, three, or four-way pipe arms shall have a minimum of 2 in. of exposed thread. Each arm of the pipe arm shall be furnished with two 72 serration locking rings. One locking ring shall have a 3 in. outside diameter and one locking ring shall have a 2 3/8 in. outside diameter. Assembly Maximum Allowable Weight Two-way 19 lb Three-way 25 lb Four-way 28 lb
922.08 Signal Cantilever Mount Signal Bracket
The bracket shall allow the following four adjustments: (a) rotational adjustment about bracket axis, 990
b.vertical adjustment, (c) rotational adjustment about signal cantilever arm, and
d.rotational adjustment right and left from vertical plane. 922.08 1186 The bracket shall be fastened to the supp orting arm or structure with stainless steel bands. The bracket shall adjust to fit all sizes of round, octagonal, elliptical, or other shape structure without spec ial tools or equipment. The bracket shall attach to the signal by clamping the signal head both top and bottom and shall be designed to accommodate the specified signal configuration. Each 1000 bracket shall be complete with all necessary hardware to attach the traffic signal to the bracket and the bracket to the support. All electrical wiring shall be concealed within the bracket, except that which runs from the bracket to the signal cantilever arm. Upper and lower arms shall be cast from aluminum in accordance with ASTM B26, alloy 713.0-T5 or 356.0-T6. The vertical support tube shall be extruded from aluminum in accordance with to ASTM B241, alloy 6061-T6 or 6063-T6, and the strapping to attach the bracket to the arm shall be stainless steel. All steel or malleable 1010 iron parts shall be hot-dip galvanized in accordance with ASTM A153 or be mechanically galvanized and conform to the coating thickness, adherence, and quality requirements of ASTM A153, B695, class 55.
922.09 Pedestal Poles and Cast Aluminum Pedestal Bases
The pedestal base used for mounting pedestrian signal heads or control cabinets shall be in accordance with 922.09(a). The length of the pedestal pole shall be as shown on the plans.
a.Cast Aluminum Pedestal Base 1020 A pedestal mounted G cabinet shall have a cast aluminum pedestal base. The cabinet and pedestal base shall be ground mounted on a concrete Type A foundation at locations and dimensions as shown on the plans. The cast aluminum base shall be made of aluminum in accordance with ASTM B179, alloy ANSI 319.1 or 319.2, or in acco rdance with ASTM B26, alloy ANSI 356.0 - T6. The square base shall include an access door and anchor bolts with nuts and washers. The base shall be 13 3/8 in. square and 15 in. in height ±1/4 in. The weight shall be 22 lb ±5%. 1030 The base shall be designed to support a 150 lb axial load and 11 sq ft of signal head area rigidly mounted. For design purposes, the distance from the bottom of the base to the center of the signal head area is 18 ft. In addition to the dead load, the base shall be designed to withstand wind and ice loads on the specified signal head area and on all surfaces of the support, in accord ance with the AASHTO Standard Specification for Structural Supports for Highway Signs, Luminaires and Traffic Signals. Wind speeds used for design shall be based on a 10 year mean recurrence interval and a wind drag coefficient of 1.2 or as shown on the plans. The base shall contain an access door, which is 8 by 8 1/4 in. ±1/4 in. with a stainless steel hex head bolt for attaching the door. 1040 922.09 The base shall be attached to a foundation by four anchor bolts, with an anchor bolt circle of 12 3/4 in. Slotted lugs shall be integrally cast into the four corners of the base for attachment of the anchor bolts. The anchor bolts shall be steel in accordance with ASTM F1554, Grade 36. The diameter of the anchor bolt shall be 3/4 in. with a minimum length of 18 in. ±1/2 in., plus 2 1/2 to 3 in. right angle hook on the unthreaded end. The top 4 in. of the bolt shall be threaded with 10 NC threads. The threads, plus 3 in., shall be hot-dip galvanized in accord ance with ASTM F2329 or be mechanically galvanized and in accordance with the co ating thickness, adherence, and quality requirements of ASTM B695, Class 55. Each anchor bolt shall be provided with two 1050 high strength heavy hex head nuts in accordance with ASTM A563 and three washers. Two of the washers shall have a minimum 2 in. and maximum 2 1/8 in. outside diameter and be in accordance with ANSI B 27, Type B regular series and one shall be a nominal 3/4 in. series W wash er, in accordance w ith ASTM F436. The cast aluminum pedestal base shall be in accordance with the dimensions and requirements shown on the plans. The casting shall be true to pattern in form and dimensions, free from pouring faults, sponginess, cracks, blowholes, and free from other defects in positions affecting the strength and value of the intended use for the casting. The base shall not have sharp unf illeted angles or corners. The surface shall 1060 have a workmanlike finish. The door and bolt for the door shall be interchangeable on cast bases from the same manufacturer.
b.Pedestal Pole The top of the base shall accommodate a pole having a 4 1/2 in. outside diameter. The threads inside the top of the base shall be 4 in. national standard pipe threads. The pole shall be either a steel pedestal pole or an aluminum pedestal pole. A steel pedestal pole shall be a seamless Schedule 40 carbon steel pipe in accordance with ASTM A53, grade B. The pol e shall have an outside diameter of 4 1/2 in. The pole shall weigh approximately 10.8 lb/ft. The length of the pole shall be as shown on the plans. The pole shall have full depth national standard pipe threads on one end of the pole. The length of threads shall be 2 1/2 in. The pole shall be galvanized, after threading, in accordance with ASTM A123. The threads shall be cleaned of all exces s galvanizing and protected by a suitable shield. 1080 An aluminum pedestal pole shall be in accordance with ASTM B241 for seamless aluminum alloy, Schedule 40, 6061-T6. The outside diameter of the pole shall be 4 1/2 in. The length of the pole shall be as shown on the plans. The pole shall weigh approximately 3.7 lb/ft. The pole shall have full depth national standard pipe threads on one end of the pole. The length of threads shall be 2 1/2 in. and protected by a suitable shield. The pole shall have a spun finish. 922.09
c.Pole Cap A pole cap shall be supplied for the top of the pole if the pole is used for the mounting of pedestrian signal faces or side mounted signal control cabinets. The pole 1090 cap shall be either a cast pole cap of al uminum or a pole cap of spun aluminum. A cast pole cap shall be made of aluminum, in accordance with ASTM B179, alloy ANSI 319.1 or 319.2. The cap shall fit freely on the 4 1/2 in. outside diameter pole. A set screw using a 3/4 in. No. 12 hex head machine screw shall be supplied to hold the cap on the pole. A standard foundry draft will be allowed on the casting. A pole cap made from spun aluminum shall be in accordance with ASTM B209, alloy 1100-0. The cap shall fit tightly when placed on the end of the pole.
922.10 Signal Supports
All welding shall be in accordance with 711.32. Welds shall generate the full strength of the shaft. Only longitudinal continuous welding will be allowed on the pole shaft. Contacting joint surfaces shall be cl eaned before fabrication then sealed by means of welding. Working drawings shall be submitted in accordance with 105.02.
a.Steel Strain Pole The steel strain pole shall be an anchor base type pole and shall include a handhole and a pole top or cap. The poles shall be furnished in lengths specified. 1110 The pole shall have a handhole within 18 in. of the base. The pole shall have a top or cap with a set screw that can be removed with small hand tools. The pole material shall be in accord ance with ASTM A595 or A572 with a minimum yield strength of 50,000 psi. The pole shall be galvanized after fabrication in accordance with ASTM A123. All hardware, handhole cover and latchi ng device, and band-type steel polebands shall be hot-dip galvanized in accordance with ASTM A153 or be mechanically galvanized and conform to the coating thickness, adherence, and quality requirements 1120 of ASTM B695, Class 55. All nuts and bolts, except anchor bolts, shall be in accordance with ASTM A307, and shall be either hot dip galvan ized in accordance with ASTM F2329 or mechanically galvaniz ed in accordance with ASTM B695, Class
55.If a cast pole top or cap is used, it sh all be in accordance with ASTM A126 and shall be galvanized with a minimum coating of 2 oz/sq ft. The polebands shall fit the pole as planned. The wire rope shall not be in contact with any 90° edges or with any threads on the band. The pole band material shall be in accordance with ASTM A572, grade 50; ASTM A606; or ASTM A36 with minimum yield of 50,000 psi. The minimum width of the bands shall be 3 in. and the 1130 bands shall be capable of supporting the pole design load. Each half of the band shall be stamped with the corresponding size number. 922.10 The pipe coupling for the weatherhead and base plate shall be installed prior to galvanizing. The threads shall be cleaned of all excess galvanizing. An internal J-hook shall be installed near the top of the pole for wire support. The steel strain pole shall be capable of supporting an 8,000 lb load applied horizontally 18 in. below the top of the pole with a maximum allowable deflection of 0.16 in. per 100 lb of load. The pole shall be tapered 0.14 in./ft of length. 1140 A one-piece base plate shall be secured to the base of the pole and shall develop the full strength of the pole. The base plat e material shall be in accordance with ASTM A36, ASTM A572, or ASTM A588. The base plate shall have four holes of adequate size to accommodate 2 1/4 in. anchor bolts. The bolt circle shall have a 22 in. diameter and bolt square of 15 1/2 in. Four high strength steel anchor bolts, 2 1/4 in. in diameter and 96 in. long, including the hook, shall be furnished with each pole. Each bolt shall have two heavy hex nuts and two washers in accordance with ASTM A563 and F436 respectively. The 1150 anchor bolt material shall be in accordan ce with ASTM A576 or ASTM A675 with a minimum yield strength of 55,000 psi or ASTM A36, special quality, modified to 55,000 psi or approved equal. The threaded end of the anchor bolt shall have 12 in. of 4 1/2 NC threads and shall be galvanized the length of the threads, plus 3 in. The threaded end shall be hot-dip galvanized in accordance with ASTM A153 or be mechanically galvanized in accordance wi th ASTM B695, Class 55. The unthreaded end of the anchor bolt shall have a standard L bend for a distance of 9 in. from the centerline of the anchor bolt to the end of the L. In lieu of the standard bend a steel plate 4 1/2 sq in. and 1 1/4 in. thick may be welded to the embedded end of the anchor bolt. 1160
b.Timber Strain Pole Timber strain poles shall be made from southern yellow pine and shall be in accordance with the cu rrent ANSI Specifications and Dimensions for Wood Poles No. 05.1. They shall be of the length and class specified. All poles shall be full length pressure treated by the full cell process in accordance with current specifications as set forth in the AWPA Standards T1 and U1, Commodity Specification D: Poles, use category UC4B using preservative as outlined in 911.02(h). Treatment, handling, and storage methods shall be in accordance with the current AWPA Standards. (c) Signal Cantilever Structures
1.General All traffic signal cantilever structures, with or without combination arm, shall be as shown on the plans. 922.10 There shall be no threads in the wearing surface plane at the point of connection 1180 between the clevis clamp and the signal face assembly. The clevis clamp shall have an 11/16 in. diameter bolt hole to receive the signal face assembly. The signal cantilever structure pole, sections 1 and 2, signal arm, and combination arm shall be a round or multi-sided tapered tube, except the upper 4 to 6 ft of a signal pole may be non-tapered. The pole and arms taper rate shall be 0.14 in./ft. A 1/2 in. 13 NC threaded grounding nut or approved equi valent shall be provided and be accessible through the handhole. The pole cap shall be secured in place with setscrews. The pole shall be provided with a removable pole cap and integral wire support hook for the luminaire electrical cable. The cable shall be attached to the hook by a service drop 1190 clamp. The signal cantilever arm and combination arm, if required, shall be attached to the pole as shown on the plans. The arms shall have cable inlets as shown on the plans. All signal heads on the arm shall be attached as shown on the plans, installed parallel to the horizontal plane, and centered to the cantilever arm. The cantilever arms shall be used as an enclosed raceway for wiring and shall be free of burs or rough edges. The pole top luminaire for roadway lighting, if required, shall be installed on these structures as shown on the plans. 1200
2.Base Plate A one-piece anchor base plate shall be supplied as shown on the plans. Four removable bolt covers shall be provided with each base and each cover shall attach to the upright portion of the body of the base by means of one-hex head cap screw.
3.Materials The signal cantilever pole, arms, base plat es, arm flange plates, gusset plates, ring stiffeners, and pole splice plates shall be in accordance with ASTM A595 or A572 with a minimum yield strength of 50,000 psi. 1210 4 . H a r d w a r e High strength heavy hex bolts for the pole splice shall be in accordance with ASTM F3125, grade A490 and shall be co ated in accordance with ASTM F1136, Grade 3, ASTM F2833, Grade 1, or ASTM F3019, Grade 4, as shown in ASTM F3125. The contact area for both pole splice plat es shall be class B in accordance with AASHTO Standard Specifications for Highway Bridges, Table 10.32.3C with a minimum slip coefficient of 0.5. The surf aces shall be blast cleaned with class B coatings. The arm flange plate connectio n bolts shall be in accordance with ASTM F3125, grade A325. All other hardware shall be in accordance with ASTM 1220 A307 and by either hot dip galvanized in accordance with ASTM F2329 or mechanically galvaniz ed in accordance with ASTM B6 95, Class 55. A cast pole cap shall be in accordance with ASTM A126 an d shall be galvanized with a minimum coating of 2 oz/sq ft. 922.10
5.Anchor Bolts Four steel anchor bolts, each fitted with two high strength heavy hex nuts and two flat washers, shall be furnished with each pole. The anchor bolt shall be as shown on the plans with a minimum of 15 in. of 7 NC threads on the upper end. The threads, nuts, and washers shall be either hot dip galvanized in accordan ce with ASTM F2329 1230 or mechanically galvanized in accordance with ASTM B6 95, Class 55. The steel for the bolt shall be in accordance with ASTM F1554, with a yield strength of 36,000 or 55,000 psi.
6.Finish All steel material shall be fully galvan ized. Galvanizing shall take place after all welding is accomplished and holes cut.
7.Working Drawings Working drawings and design calculations shall be submitted in accordance with 1240
105.02 (d) Downguys, Anchors, Rods, and Guards
Pole anchors shall be 8-way expanding with a minimum area of 135 sq in. when expanded or a 10 in. diameter screw anchor. They shall have a minimum holding strength of 10,000 lb. They shall be painted and in accordance with ASTM A575. Anchor rods for expanded anchors shall be 3/4 in. diameter steel and for screw anchors shall be 1 1/4 in. diameter steel, 8 ft long, in accordance with ASTM A659, and be galvanized in accordance with ASTM A153. Guy guards shall be made of 18 gauge galvanized steel, polyethylene, polyvinyl chloride, or melamine phenolic, and shall be 7 ft long. The steel guy guard shall have a tight gripping, non-scarring hook for quick attachment to the guy wire. The bottom shall have a clamp that fits over the anchor rod and securely grips by tightening the bolt. Steel guy guards shall be in accordan ce with ASTM A659. The nonmetallic guy guard shall be a helical pigtail which shall resist upward movement, a lock strap to secure the lower end, and a guy guard sleeve. Non-metallic guy guards shall be gray or yellow. (e) Support Cable 1260
1.Messenger Cable Messenger cable shall be zinc-coated steel wire strand, contain seven wires, and have a nominal diameter of 3/8 in. The cable shall be in accordance with ASTM A475, Siemens-Martin Grade.
2.Span, Catenary, and Downguy Cable Span, catenary, and downguy cable shall be aircraft cable for no n-aircraft use, be 3/8 in. nominal diameter, made of stainless steel wire, and consist of seven, 19-wire 922.10 1192 flexible steel strands. The 3/8 in. cable shall have a minimum breaking strength of 1270 12,000 lb. It shall be in accordance with Military Specifications MIL-W-83420D.
3.Tether and Support Cable Tether and support cable shall be aircraft cable, for non-aircraft, and shall be 1/4 in. nominal diameter, made of stainless steel wire, and consist of seven, 19-wire flexible steel strands. The 1/4 in. cable shall have a minimum breaking strength of 6,400 lb. It shall be in accordance w ith Military Specifications MIL-W-83420D.
4.Cable Hardware 1280
a.Messenger Hangers Messenger hangers shall be either a 3-bolt clamp or a 3/8 by 1 3/4 in. steel hanger with a 90° bend extending from the pole 3 3/4 in. The hanger shall have a curved groove and clamp capable of receiving a 5/16 to 1/2 in. cable. The messenger shall be clamped by two 1/2 in. high carbon steel bolts. The angle hanger shall be mounted with a 5/8 in. through bolt and a 1/2 in. lag screw. The three-bolt clamp shall be mounted with a 5/8 in. through bolt. The angle hanger shall be in accordance with ASTM A575. The bolts sha ll be in accordance with NEMA PH 23.
b.Cable Ring Cable rings shall be galvanized steel in accordance with IMSA 51-1. c . C l a m p s Clamps shall be made of 3/8 in. steel and in accordance with ASTM A575. Two bolt clamps shall be a minimum of 3 3/4 in. long and 1 1/4 in. wide with two 1/2 in. bolts which shall clamp cable of 1/8 to 1/2 in. diameter. Three bolt clamps shall be a minimum of 6 in. long and 1 5/8 in. wide with three 1300 5/8 in. bolts which shall clamp cable of 5/16 to 1/2 in. diameter. The bolt heads shall be large enough to provide maximum clamping area and shall have oval shoulders to prevent the bolts from turning while tightening. The bolts shall be in accordance with NEMA PH 23.
d.Servi-Sleeves Servi-sleeves shall be 1 1/4 to 2 1/4 in. in length and shall hold the size of the cable specified. The sleeves shall be in accordance with ASTM A659.
e.Straight Eye-Bolts Straight eye-bolts shall be 3/4 in. diameter drop forged steel, a minimum of 14 in. long, and have 6 in. of thread. The steel washers shall be 2 1/4 by 2 1/4 by 3/16 in. in size with a 13/16 in. hole in the center. All parts shall be in accordance with ASTM A575 and shall be galvanized in accordance with ASTM A123. 922.10
f.Hub-Eyes Hub-eyes shall be made of drop forged steel and in accordance with ASTM A575. They shall receive a 3/4 in. mounting bolt and have a full rounded thimble eye for protection of the guy cable. 1320
922.11 Signal Cable
a.Hook-up Wire Signal hook-up wire shall be strande d one conductor wire, Type THW seven strand No. 14 AWG, with a thermoplastic sheath 3/64 in. thick and a 600 volt rating. Insulation shall be color-coded, as required, and labeled with gauge, voltage rating, and insulation type.
b.Signal Control Cable 1330 Signal control cable shall be in accordance with IMSA 19-1 or 20-1 and shall be stranded No. 14 AWG wire. (c) Service Cable Traffic signal service cable shall be color coded, stranded copper No. 8 AWG wire, three conductor cable, Type THWN.
922.12 Signal Interconnect (a) Integral Messenger Interconnect Cable 1340
Integral aerial interconnect cable shall be figure “8” self-supporting type cable consisting of a messenger cable and seven conductors No. 14 AWG signal cable in accordance with IMSA 20-3.
b.6 Pair/19 Telemetry Cable Six pair telemetry cable shall contain six twisted pairs of 19 gauge conductors and shall be in accordance with IMSA 40-2 for underground application and IMSA 40-4, integral messenger, for aerial application. (c) Fiber Optic Interconnect Cable 1350 Fiber optic cable shall contain 12-strand multimode, graded index, optic fibers with a minimum of one non-metallic central strength member. The cable shall be gel- free design, loose tube, all dielectric construction, suitable for outdoor use in conduit or on aerial supports. Each length of fiber optic cable in nonmetallic conduit shall include a No. 14 AWG aluminum or No. 6 AWG copper tracer wire. Each individual fiber shall be 2.5/5 mils (62.5/125 μm) diameter, core/color- coded clad, and each color-coded set of fibers shall be encased in a loose tube buffer with water blocking tape on the outside and fully water blocked inside using craft-friendly, water-swellable yarns. The fiber optic cable shall be constructed with Kevlar 1360 braid and outer polyethylene jackets as a minimum. If an inner jacket is used, it shall 922.12 1194 be PVC. Maximum attenuation of the cable shall be 4.0 dB/km nominal, measured at room temperature at 850 nm. The bandwidth shall not be less than 160 MHz/km, also at 850 nm. Each fiber shall be continuous with no factory splices except for joining standard length cables to form longer, continuous jacketed cable to fit installation requirements. The cable shall have standard nylon rip cords. Kevlar rip cords will not be accepted. The cable shall be in acco rdance with the generic requi rements for optical fiber and optical fiber cable per ANSI/ICEA S-104-696 design and test criteria. 1370 The exterior of the polyethylene outer cabl e jacket shall be stenciled so that every 16.4 ft on each reel is marked with a number. The 16.4 ft of each reel shall be marked with a 5, the 32.8 ft marked with a 10, and so on until the end of the reel. The stencil shall be applied to the outer jacket using permanent ink and shall be permanently engraved into the jacket to provide long lasting readability.
d.Radio Interconnect Usin g Spread Spectrum Radio Modems Spread spectrum radio modems for communications between local controllers and the system master controller shall be on the QPL of Traffic Si gnal and ITS Devices. 1380
922.13 Detection Components
a.Loop Detector Lead-in Cable Runs 700 ft and less of loop detector lead-in cable shall be in accordance with IMSA 50-2 and shall be stranded two conductor No. 16 AWG, 19 strands of No. 29 wire. Runs greater than 700 ft shall use 14 AWG wire. The nominal capacitance between conductors shall be 57 pF/ft and 98 pF/ft between one conductor and the other 1390 conductor connected to the shield.
b.Roadway Loop Wire Roadway loop wire shall be 14 AWG ga uge IMSA 51-7 duct-loop wire with polyvinyl chloride or polyethylene outer jacket of 1/4 in. diameter. (c) Other Vehicle Detection Systems Other vehicle detection systems shall be selected from the QPL of Traffic Signal and ITS Devices.
922.14 Ground Wire
The ground wire shall be copper wire No. 6, AWG soft-drawn, solid copper in accordance with ASTM B3.
922.15 Splicing Kit
Splicing kits shall contain a two-piece, transparent snap-together mold body and include an epoxy and sealing compound contained in a unipak. It shall be capable of 922.13 1195 insulating and splicing nonshielded cables rated up to 5 kilovolts and multi-conductor cables rated up to 600 volts.
922.16 Ground Rod and Connections
Ground rods shall be 1/2 in. in diameter by 8 ft long with a machined point and chamfered top. They shall be made of steel with a molecularly bonded outer layer of electrolytically ap plied copper. A single electrode shall have a maximum resistance to ground of 25 ohms. Single electrodes that do not have resistance to ground of 25 ohms or less shall be augmented by additional electrodes, grids, or plates until resistance to ground of 25 ohms or less is achieved. Resistance shall be measured using a three-point ground tester using the fall of potential method. Data, graphs, resistance in ohms, date of test, make and model of ground tester, and the individual’s initials performing the test shall be recorded and submitted to the District Office. Resistance in ohms shall 1420 be tagged at the ground connection. The finished rod shall be cold-drawn and shall have the following minimum physical properties: Physical Property Value Tensile strength, min. 97,000 psi Yield strength, 0.2% offset, min. 85,000 psi % of elongation 13 - 40 The ground rod and wire connection shall be made by a thermo weld process or approved equal. The welding material shall cover and secure the conductor to the rod and shall be porous free. 1430 An acceptable alternate shall be a ground grid connection properly sized and shall consist of a shear head bolt, a “C” shaped body, nest, and wedge. The connector components shall be fabricated from an aluminum-bronze alloy, silicone-bronze alloy, or copper.
922.17 Handholes
a.Type I (Concrete Handhole) A Type I handhole shall be made of class III reinforced concrete pipe with a cast iron ring and cover. The concrete shall be in accordance with section 907.02. 1440 Reinforcement shall be provided as show n on the plans or in accordance with the manufacturer’s design. If reinforcement deviates from the plans, provide calculations showing that the modified design supports HS-20-44 loading. The ring and cover for handholes shall be in accordance with 910.05(b). (b) Type II (Alternative Handhole) A Type II handhole shall be made of polym er concrete or other material that is certified to be in accordan ce with ANSI/SCTE 77 and meet or exceed Tier 22 loading requirements. The handhole shall be stackable. 922.17 1196 1450
1.Handhole Box The handhole box shall be heavy duty. The inner surface of the handhole shall be smooth and free from cracks and imperfections. 2. Handhole Cover The cover shall be marked with logo imprints of “TRAFFIC SIGNAL” and the ANSI/SCTE Tier rating - “TIER XX”. The cove r shall be secured with stainless steel, 300 series, 3/8 in., 16 NC hex bolts and washers. The cover shall have a friction coefficient of at least 0.5. 1460
c.Type III (Handhole located in the Roadway) A Type III handhole shall be AASHTO HS-20 rated. The handhole box shall be concrete. The ring and cover shall be steel and shall be secured to the handhole box.
922.18 Entrance Switch
The entrance switch shall be a double pole, 50A, 120V AC circuit breaker in a NEMA Type 3R enclosure in accordance with NEMA 250-2008. The minimum dimensions of the enclosure shall be 5 in. wide, 3 3/4 in. deep and 9 1/4 in. high. A 1 in. rain-tight detachable hub shall be supplied in the top of the enclosure. The enclosure shall have knockouts on the sides, bottom and back with diameters of 7/8 in. to 1 3/4 1470 in. The enclosure shall contain the circuit br eaker, an insulated solid bar for connection of AC neutral, a separate lug for attachment of earth ground, have provisions for a padlock, and shall be surface mounted. The enclosure shall be made of galvanized steel with a rust inhibiting treatment and finished in the manufacturer’s standard color of baked enamel. All wire terminations and breaker to buss-bar contact points inside the enclosure shall be coated with an anti-oxidant to prevent oxidizing and corrosion of components. 1480
922.19 Conduit and Fittings
a.Steel Conduit Steel conduit, couplings, and elbows shall be galvanized rigid steel conduit in accordance with UL 6. The co nduit shall be galvanized by the hot dip method on the interior and exterior surfaces. Conduit thr eads shall be cut after galvanizing. The conduit shall be supplied with a threaded coupling attached to one end and the other threaded end protected by a suitable shield. The various conduit fittings such as bands, bodies, straps, lock nuts, and threadless 1490 connectors, shall be in accordance with Federal Specifications A-A-50553, and shall be galvanized if not stainless steel. Conduit straps shall be two hole straps with a minimum thickness of 1/8 in. Conduit lock nuts 3/8 to 1 1/2 in. in size shall be made of steel. Other sizes shall be made of either steel or malleable iron. All conduit lock nuts shall be galvanized. Other nuts shall be either stainless steel or galvanized steel. 922.18
b.PVC Schedule 40 or 80 Conduit Conduit, fittings, and accessories shall be manufactured from PVC meeting ASTM D1784 and shall comply with all th e applicable requirements of NEMA TC2 and UL 651. Each length of pipe shall include a coupling. 1500
c.Fiberglass Conduit Rigid fiberglass conduit and fittings shall be filament wound consisting of E-glass and corrosion resistant epoxy resin manufactured for use at temperatures from -40 to 230°F. Rigid fiberglass conduit shall be pigmented with carbon black for ultraviolet protection and fire resistant per UL 94. All rigid fiberglass conduit shall have tracer wire, be heavy walled, HW, and meet the specifications, labeling, and testing of ANSI/NEMA TC9.
d.HDPE Schedule 40 or 80 Conduit 1510 Conduit shall be smooth wall, Type III, Grade P-33, Category 5, Class C, coilable, HDPE. SDR 13.5 may be used for Schedule 40 HDPE and SDR 11 may be used for Schedule 80. Conduit and fittings shall meet the applicable requirements of ASTM D1248, ASTM D3350, ASTM F2160 and UL 651. Schedule 40 or 80 HDPE conduit shall be marked in accordance with ASTM D3485 with the producer code and designati on type indicated. HDPE conduit shall be produced from material with an orange color and ultraviolet stabilization code of C, D, or E in accordance with ASTM D3350. Schedule 40 HDPE conduit for use above ground shall be black. 1520
922.20 Detector Housing The entire housing casting shall be made from aluminum alloy in accordance with ANSI 320. 922.21 Certification
A Type C certification in accordance with 916 shall be provided for traffic signal materials and equipment un less otherwise specified.
Source: Indiana Standard Specifications, 2024 Edition. Pages 1180–1200 of 1,248.