TRAFFIC SIGNAL HEADS SECTION 1075 751 wing nuts for opening and closing the door without the use of special tools. Provide a gasket groove on the inside of the door to accommodate a weatherproof and mildew proof resilient gasket which, upon closing the door, will seal against a raised bead of the housing, making a positive seal.
D.Equip the field terminal assembly with a 3 terminal pair (6 screw) type terminal block for
termination of the 3 field #14 AWG spaded terminal wires for AC (+) for the “hand” and “person” icon and AC ( -). Equip the side of the terminal with a male quick disconnect blade that mates with the insulated female quick disconnect lug supplied on the LED module. Bolt an aluminum base plate to the signal display housing for the field terminal assembly.
E.Design the visor to eliminate sun phantom and minimize damage to the LED module and provide
in flat black, federal color 595B -37038. Install the visor parallel to the face of the signal display, held in place by stainless steel screws. Provide the visor assembly with a minimum of 20 straight louvers and 21 zigzag pattern horizontal louvers.
F.Before assembling, thoroughly clean all aluminum elements and apply a chromate conversion
coating inside and outside as per military specification MIL -DTL-5541. Electro -statically apply a synthetic enamel conforming to military specification TT -E-529. P rovide finish, oven cured for at least 20 minutes at a temperature of 350 degrees F. Supply the signal display housing in yellow with a black door. Provide a dustproof, weatherproof, and corrosion resistant signal display as installed.
G.Provide all materials required to mount the LED countdown signal assemblies in accordance with
the contract. .
A.Provide pedestrian pushbutton assembly conforming to all minimum size requirements set forth
by the Americans with Disabilities Act (ADA). Design the pushbutton assembly to prevent electrical shock under any weather conditions and have provisions for gr ounding in accordance with the NEC. Supply each pedestrian pushbutton assembly to include the pushbutton housing complete with front cover and a push button switch. Equip the LED pushbutton assemblies with a LED/audible indicator. Supply any control equipm ent necessary for the pushbutton assemblies to operate as specified at no additional charge. Assume an average of 6 pushbutton assemblies per intersection for the purposes of distributing control equipment costs. Supply control equipment to fit into a stan dard traffic signal control cabinet.
B.Supply the pushbutton housing in yellow (color number 595B -13538) cast aluminum. Design the
rear of the housing curved and to accommodate pole diameters from 3 inches to 14 inches, with a 1/2-inch diameter access hole for wiring at the rear of the housi ng. Cap the access hole with a plastic plug. Equip the housing at the front to allow for mounting of the front cover.
C.Supply the front cover in yellow (color number 595B -13538) cast aluminum. Provide a weather -
tight seal between the housing and the cover using a neoprene gasket. Secure the cover and the pushbutton switch to the housing with stainless -steel, vandal -resistant screws.
D.Provide weatherproof and tamperproof, pushbutton switches to be actuated by a 2 inch diameter
mushroom plunger. Use a spring installed between the plunger and the switch that has an operating force of no more than 5 pounds. Provide a moisture barrier be tween the plunger and the switch and a 2 -position terminal block for termination of the #14 AWG pushbutton wire. Provide a pushbutton switch capable of operating in at temperature range of -30 degrees F to TRAFFIC SIGNAL HEADS SECTION 1075 752 +165 degrees F and rated for up to 10,000,000 actuations. Provide the pushbutton switch electrically rated to carry 25 amps at 125 volts AC, 250 volts maximum.
E.The Department will provide the sign for the pushbutton assembly to the contractor for
installation as shown in the contract.
F.Provide all materials required to mount the pushbutton assembly in accordance with the contract.
1075 .15 Rectangular Rapid Flashing Beacon (RRFB) Indication.
A.Provide two 5 -inch x 2-inch minimum rapidly and alternately flashed rectangular yellow
indications having LED -array based pulsing light sources, designed in accordance with FHWA interim approval IA -11 and current interpretations. The light intensity of the RRFB’s indications shall b e Society of Automotive Engineers (SAE) standard J595 certified to meet Class I.
B.Design the RRFB assembly so that, when activated, the two yellow indications in each RRFB shall
flash in a rapidly alternating "wig -wag" flashing sequence (left light on, then right light on). Each of the two yellow indications of an RRFB shall have 70 to 80 periods of flashing per minute and shall have alternating, but approximately equal, periods of flashing light emissions and dark operation. During each of its 70 to 80 flashing periods per minute, the yellow indications on the left side of the RRFB shall emit two slow pulses of light after which the yellow indications on the right side of the RRFB shall emit four rapid pulses of light followed by a long pulse. The fl ash rate of each individual yellow indication, as applied over the full on -off sequence of a flashing period of the indication, shall not be between 5 and 30 flashes per second, to avoid frequencies that might cause seizures.
C.Design the flashing display to be normally dark and initiate operation only upon pedestrian
actuation. Activation of the RRFB will be by pushbutton. The flashing display shall cease operation at a predetermined time after the pedestrian actuation. The duration of operation shall be programmable from 1 -second to 100 -seconds.
D.Supply the RRFB display housing finished in brushed aluminum or black powder coat. All exposed
hardware shall be anti -vandal.
E.Provide all materials required to mount the RRFB assembly in accordance with the contract.
SPAN WIRE AND MESSENGER WIRE SECTION 1076 753 SECTION 1076 — SPAN WIRE AND MESSENGER WIRE
1076.1Material Requirements.
Provide all span wire, messenger wire, and accessories new and free of defects. Use hardware meeting AASHTO M232, Class C requirements unless otherwise specified. 1076.1.1 Span Wire.
A.Span wire, 7/16 -inch: use galvanized steel extra high -strength grade wire meeting ASTM A475 and
having a minimum of 7 wires, 7/16 -inch in diameter and a minimum tensile strength of 20,800 pounds.
B.Span wire, 1/4 -inch: use galvanized steel wire meeting ASTM A475 requirements and having a
minimum of 7 wires, 1/4 -inch in diameter and a minimum strength of 6,650 pounds.
C.Span wire hardware:
1.2 service sleeves – to anchor the loose ends of the span wire.
2.2 strain insulators – minimum rated strength of 20,000 -pounds.
3.4 galvanized guy clamps – 6 inches in length, each complete with three 5/8-inch galvanized bolts
and nuts, meeting AASHTO M232, Class C, and suitable for use on 7/16 -inch to 1/2 -inch span wire.
4.Additional hardware may be required for span -to-span attachments, such as “H” span and
“suspended box” span installations.
D.Additional materials for wood pole installation:
1.4 strain plates.
2.16 galvanized screws, 1/4 -inch x 2 1/2 -inches.
3.4 guy hooks.
4.4, 5/8-inch x 4 inches lag screws.
1076.1.2 Dead End Messenger Wire Attachment.
A.Materials for wood pole installation:
1.Galvanized eyebolt with a rod diameter of 3/4 -inch and a length to suit the use intended with 2
galvanized nuts.
2.2 each, 3 -inches x 3 -inches x 1/4 -inch galvanized washers with 13/16 -inch hole.
3.Service wedge clamp.
B.Materials for steel pole installation:
1.2 galvanized guy clamps 6 -inches long with three, 5/8-inch galvanized nuts and bolts.
2.A service sleeve to anchor the loose end of the messenger wire.
1076.1.3 Intermediate Messenger Wire Attachment.
A.Straight run intermediate messenger wire attachment:
SPAN WIRE AND MESSENGER WIRE SECTION 1076 754 1. Depending on the size of the messenger wire, use a galvanized cable suspension clamp or a galvanized guy clamp. Use clamp that is 6 -inches long with 2 outside holes suitable for 1/2 -inch bolts and 1 center hole for a 5/8 -inch machine bolt. Equip the clamp assembly to include two 1/2-inch galvanized nuts and bolts.
2.Galvanized machine bolt with a rod diameter of 5/8-inch and a length to suit the use intended
with 2 galvanized nuts.
3.Guy hook.
4.3-inches x 3 -inches x 1/4 -inch galvanized steel washer with 11/16 -inch center hole.
B.Angular run intermediate messenger wire attachment:
1.Two service wedge clamps.
2.Galvanized eyebolt with a rod diameter of 3/4 -inch and a length to suit the use intended with 2
galvanized nuts.
3.Two 3 -inches x 3 -inches x 1/4 -inch galvanized steel washers with 13/16 -inch center hole.
1076.1.4 Grounding Equipment.
A.3 feet of #6 AWG solid copper wire in accordance with Section 832.
B.#4 plated split -bolt connector (Blackburn #4 HPS).
C.Parallel groove connector (Blackburn #K2 jumper clamp).
GUYS AND ANCHORS SECTION 1077 755 SECTION 1077 — GUYS AND ANCHORS
1077.1Material Requirements.
Use hardware meeting AASHTO M232 Class C requirements, unless otherwise specified. 1077.1.1 Down Guy and Anchor
A.Provide stranded guy wire in accordance with Section 1076.1.1 and as specified in the contract.
B.Screw anchors with forged -eye anchor rods:
1.Nominal rating of 8,000 -pounds in average soil.
2.8-inch diameter.
3.2-inch pitch.
4.1-inch rod diameter.
5.5 1/2 -inch rod length.
C.Galvanized guy clamps:
1.Suitable for 7/16 -inch stranded guy wire.
2.6-inches in length.
3.Three 5/8-inch galvanized nuts and bolts.
D.Galvanized guy attachments:
1.Galvanized machine bolt - Rod diameter of 5/8-inch minimum, length to suit the pole used.
2.Full round and half -round guy wire protector - 7-feet in length, yellow plastic material.
3.Flat washer 3-inch x 3-inch x 1/4 -inch with an 11/16 -inch hole for 5/8-inch bolt or flat washer 3 -
inch x 3 -inch x 1/4 -inch with a 13/16 -inch hole for 3/4 -inch bolt, as appropriate.
E.Sidewalk guy fittings.
F.Pipe for sidewalk guys.
G.#6 AWG solid bare copper ground wire in accordance with Section 832.
H.2 parallel groove connectors - Blackburn #K2 – jumper clamp, Ilsco, or approved equal.
I.#4 plated split bolt connector - Blackburn #4HPS, Thomas and Betts and Burndy, or approved
equal.
J.Strain insulator, minimum rated strength of 20,000 -pounds.
1077.1.2 Overhead Guy
A.Provide stranded guy wire in accordance with Section 1076.1.1, and as specified in the contract.
B.Galvanized thimbleye bolts or machine bolts and galvanized thimbleye nuts.
C.Galvanized square washers.
D.Galvanized square nuts.
E.Strain insulator, minimum rated strength of 20,000 -pounds.
GUYS AND ANCHORS SECTION 1077 756 F. Galvanized guy clamps:
1.6-inches in length.
2.Complete with three 5/8-inch galvanized bolts and nuts, suitable for use on 1/4 -inch to 1/2 -inch
guy wire.
G.For each end of the overhead guy:
1.#6 AWG solid bare copper wire, 3 -feet in length in accordance with Section 832.
2.2 parallel groove connectors - Blackburn #K2 – jumper clamp, Ilsco, or approved equal.
SERVICE PEDESTALS AND SAFETY SWITCH SECTION 1078 757 SECTION 1078 — SERVICE PEDESTALS AND SAFETY SWITCH
1078.1Materials Requirement.
A.Pedestal board:
1.Aluminum or galvanized steel.
2.Minimum 1/4-inch thickness.
B.Weather proof stamp.
C.Single position sockets:
1.Milbank U7040 -RL-TG or U4532 -XL cutler Hammer, or approved equal.
D.Fusible or non -fusible heavy -duty safety switch:
1.See contract for voltage and current rating.
2.NEMA 3R enclosure, Square D, Eaton, or approved equal.
E.#4 split bolt connector:
1.Burndy #KSU20, Blackburn, or approved equal.
F.Pressed steel channel clevis:
1.Blackburn #W62, Burndy, or approved equal.
G.Insulator.
H.Circuit breakers, molded case type:
1.Minimum rating of 10,000 -amp interrupting capacity (AIC).
2.Quick make, quick break, thermal magnetic, trip indicating, and have common trip on all
multiple breakers with internal tie mechanism.
3.Provide circuit breakers with the current and voltage ratings and number of poles in accordance
with the contract.
4.Treated to resist fungus.
5.Ambiently compensated for the enclosure and proximity to adjacent breakers.
6.Bolt in type.
I.Photoelectric controls:
1.Solid state, cadmium sulfide type with hermetically sealed silicone rectifier rated 120 volts, 60
cycle AC , and 1,000 watts maximum load.
2.Equip with built in surge protection.
3.Equip with a fail -safe operating feature so that the lighting circuits will remain energized in the
event the photo control components become inoperative.
4.Provide n ominal operating levels of this control that turn on at a minimum vertical illumination
value of 3 foot -candles and turn off at a maximum vertical illumination value of 6 foot -candles: SERVICE PEDESTALS AND SAFETY SWITCH SECTION 1078 758 a. Have the manufacturer set these limitations; tolerances of ± 20 percent for the specified value is acceptable .
5.Equip with twist lock type photoelectric controls for luminaires and lighting controls.
6.Supply with a suitable mounting bracket with locking type receptacle and all other necessary
mounting hardware.
J.Contactors and relays.
1.Provide contactors of the current ratings and number of poles specified in the contract:
a.Fully rated for all classes of load to 600 volts.
b.Has an interrupting rating of 600 percent of rated current.
2.Provide a HAND -OFF-AUTOMATIC selector switch in the photoelectric cell circuit.
3.Provide relays of the type, size, and contact ratings in accordance with the contract.
K.Panel boards .
1.Federal specification W -P-115.
2.Suitable for operation on the voltage and type service specified.
3.UL listed and labeled.
4.Equipped with the number and size circuit breakers as specified.
5.Provide circuit breakers in panel boards that meet requirements in federal specification W -C-
375 and bolt to copper busses.
6.Buss ratings shall be as specified.
L.Lightning arresters:
1.Secondary type, having the specified number of poles and 0 to 650 volts RMS.
2.Provided with suitable mounting brackets and all other necessary mounting hardware.
M.Control power transformers:
1.Dry type, 2 windings, of the size and voltage ratings specified in the contract.
N.Enclosures:
1.Meet the NEMA type specified.
2.Dead front type weatherproof metal enclosed self -supporting structures, in accordance with the
contract.
3.Free standing enclosures:
a.Fabricated from sheet aluminum and meet the requirements below.
i.Use panel and control equipment cabinets in accordance with the manufacturer’s standard
enclosure for the type and application specified. ii. Door clamps, solid neoprene gaskets, welded seams, stainless steel external hardware, and continuous hinges with stainless steel pins. iii. 2 weep holes in the bottom. SERVICE PEDESTALS AND SAFETY SWITCH SECTION 1078 759 iv. Equipped for padlocking.
4.Pad mounted enclosures:
a.For ventilation, provide all cabinets with louvered vents in the front door with a removable air
filter.
b.Provide louvers that meet the NEMA Rod Entry Test for 3R rated ventilated enclosure.
c.Use filters for all cabinets with the dimensions of 16 -inches long, 12 -inches wide and 1 -inch
thick.
i.Install the filter so that it covers the vents and remains firmly in place with top and bottom
brackets and a spring -loaded upper clamp. ii. Vent exhaust air out of the cabinet between the top of the cabinet and the main access door. iii. Screen the exhaust area with a material having a maximum hole diameter of 1/8-inch.
O.Thermostats and fans:
1.Provide a thermostatically controlled cooling fan for all cabinets, rated for 125 percent of
capacity.
2.Mount fan at the top of the cabinet.
3.Use only thermostats of the inline type, single pole, 120 volts, 10 amps with a minimum range of
40 to 80 degrees F.
4.Use a fan with a minimum rated capacity of 100 CFM air flow and a minimum rated design life of
100,000 hours.
5.Provide a thermostat that is manually adjustable, within a 10 -degree range, from 70 to 160
degrees F.
P.Disconnect switches and utility connections:
1.NEMA standard KS 1.
2.Use only a Type 4 stainless steel enclosure, with external operating handle, enclosure cover
interlock, and external switch mechanism handle with provisions for securing in both the ON and OFF positions by padlock.
3.Use a switch mechanism of heavy duty design with quick make, quick break type operations,
and visible blades.
4.Use a disconnect switch on the line side fusible with integral fuse puller.
5.Use a non -fusible disconnect switch on the load side.
6.Provide single phase disconnect switches that have 2 poles with a solid neutral and rated at 240
volts.
7.Provide 3 phase disconnect switches that have 3 poles with a solid neutral and rated at 600
volts.
8.The design of the neutral bar may be factory or field installable.
SERVICE PEDESTALS AND SAFETY SWITCH SECTION 1078 760 9. Use single phase 60 amps (fused 35 amps) for disconnect switch fuseholders for traffic signals, intersection control beacons, and intersection lighting operating at 120 volts.
10.Use single phase 30 amps (fused 20 amps) for disconnect switch fuseholders for hazard
identification beacons and luminaires mounted on traffic signal structures operating at 120 volts.
11.Equip disconnect switches for lighting control cabinets with the same number of poles and
amperage rating specified in the electrical service equipment item.
12.Equip disconnect switches for electrical service distribution cabinets with 200 amp, 2 pole, and
single phase.
LOOP DETECTOR SECTION 1079 761 SECTION 1079 — LOOP DETECTOR
1079.1Material Requirements.
A.Loop Wire
1.One-conductor #14 AWG cable in 1/4 -inch flexible tubing consisting of cable preinstalled in a
polyethylene (PE) plastic duct meeting IMSA 51 -5, rated for 600 volts.
2.Provide a cable with a temperature tolerance range of at least -65 to 176 degrees F.
3.Provide a conductor of AWG #14 stranded copper.
4.Provide a cable with an outside diameter of 1/4-inches.
B.Flexible embedding sealer – A two -component polyester loop sealant that is highly durable and
remains permanently flexible. Use a loop sealant capable of withstanding the corrosive effect of road salts, automotive fluids, jet fuel, gasoline, and extreme weather conditions. Use a loop sealant that features rapid chemical curing and has extreme adhesion to concrete and asphalt. A sealer accelerant or retarder may be added per the manufacturer’s recommendations.
LIGHTING CONTROL CABINETS SECTION 1080 762 SECTION 1080 — LIGHTING CONTROL CABINETS
1080.1Cabinet Enclosure.
A.Enclosure rated NEMA 3R, NEMA 3RX, or NEMA 4X.
1.Enclosures shall be fabricated from 304L or 316L stainless steel or 5052 -H32 aluminum.
B.Enclosure has door clamps, solid neoprene gaskets, welded seams, stainless steel external hardware,
and continuous hinges with stainless steel pins.
C.NEMA 4X shall be dead front type weatherproof enclosed structure.
D.NEMA 3RX l cabinet shall be louvered vent in the front door with a removable air filter:
1.Filters are 16 -inches long, 12 -inch wide, and 1 -inch thick.
a.Filter covers vents and is held firmly in place with top and bottom brackets and a spring -loaded
upper clamp.
2.Exhaust air is vented out of the cabinet between the top of the cabinet and the main access door:
a.Exhaust area screened with a screen type material having a maximum hole diameter of 1/8-inch.
E.Install 2 weep holes at the bottom.
F.Equip enclosure with a pad-lockable handle .
1080.2Circuit Breakers.
A.Breakers are commercial grade bolt -in type.
B.Conforms to federal specification W -C-375.
C.Molded case type with minimum rating of 22,000 amp interrupting capacity (AIC).
D.Quick make, quick break, thermal magnetic, trip indicating.
E.Breakers are multi -pole, with internal tie mechanism to provide means of simultaneous trip.
1.Do not use single pole breakers with handle ties.
F.Breakers have current and voltage ratings, with number of poles in accordance with the contract.
G.Breakers are capable of accepting up to a #2 AWG conductor.
H.Treat breakers to resist fungus and remain ambiently compensated for the enclosure and proximity
to adjacent breakers.
I.Provide a minimum of 2 spare circuit breakers.
1080.3Photoelectric Control.
A.Shall be solid state, cadmium sulfide type, with hermetically sealed silicone rectifier.
B.Rated at 120/240 or 277 volts, 60 cycle AC, 1,000 watts maximum load, with built in surge protection.
C.Failsafe operating feature so that lighting circuits remain energized in the event the photo control
components become inoperative. LIGHTING CONTROL CABINETS SECTION 1080 763 D. Nominal operating levels turn on at a minimum vertical illumination value of 3 fc (32 lux) and turn off at a maximum vertical illumination value of 6 fc (65 lux).
1.These limitations are set by the manufacturer. Tolerances of ± 20 percent are acceptable.
E.Photoelectric control is twist lock type.
1.Provide suitable mounting bracket with locking type receptacle and all other necessary mounting
hardware.
1080.4Contactors and Relays.
A.Permanent magnets hold the contactors.
B.Fully rated for all classes of load to 600 volts AC, with interrupting rating of 600 percent of rated
current.
C.Provide a HAND -OFF-AUTOMATIC selector switch in the photoelectric cell circuit.
D.Relays are of type, size, and contact ratings in accordance with the contract.
1080.5Panel boards.
A.Conforms to UL listed.
B.Panel board has a minimum of 12 spaces for branch circuit breakers.
C.Suitable for operating voltage in accordance with the contract.
D.Equipped with the number and size circuit breakers in accordance with the contract.
E.Circuit breakers are bolted to copper busses.
1.Buss ratings are in accordance with the contract.
F.Provide transient voltage surge suppressors (TVSS).
1080.6Lightning Arresters.
A.Arresters are secondary type, with 0 -650 volts RMS, and number of poles in accordance with the
contract.
B.Provide suitable mounting brackets and all other necessary mounting hardware for arresters.
1080.7Fans and Combination Thermostat/Humidistat.
A.Provide a thermostatically controlled cooling fan, rated at 125 of capacity, for all cabinets.
B.Mounted inside, at the top of the cabinet, in accordance with the contract.
C.For single phase cabinets, thermostat/humidistat is inline type, single pole, with an operating voltage
of 120 VAC, rated at 10 amps, with a minimum range of 70 degrees F to 160 degrees F.
1.Fan has operating voltage of 120 VAC, with minimum rated capacity of 100 CFM air flow and
minimum rated design life of 100,000 hours.
D.For 3 phase cabinets, thermostat/humidistat is inline type, 3 pole, with an operating voltage of 480
VAC, rated at 10 amps, with a minimum range of 70 degrees F to 160 degrees F. LIGHTING CONTROL CABINETS SECTION 1080 764 1. Fan has operating voltage of 480 VAC, with minimum rated capacity of 100 CFM air flow and minimum rated design life of 100,000 hours.
765 LIST OF TABLES
Table 108.4 -1. Acceptable CPM Schedule Activity Calendars. ................................ ................................ .... 68 Table 401.3 -1. Minimum Ambient Air Temperature for Placement of Types of Bituminous Concrete ... 132 Table 501.5 -1. Price Adjustments for Concrete Pavement Thickness Deficiency ................................ .... 149
Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 761–775 of 779.