DelDOT Section 837: Traffic Signal Indications

837.1Description.

This work consists of providing, assembling, and installing, or removing light emitting diode (LED) traffic signal and pedestrian signal indications.

837.2Materials.

A.Traffic Signal Heads Section 1075

B.Rectangular Rapid Flashing Beacon (RRFB) Unit:

1.RRFB Indication Section 1075

2.Signs Section 818

3.LED Pedestrian Pushbutton Assembly Section 1075

837.3Construction.

A.This specification refers to definitions and practices described in the following ITE documents:

1.“Vehicle Traffic Control Signal Heads – Light Emitting Diode (LED) Circular Signal Supplement”

dated June 27, 2005 and referred to in this document as VTCSH-LED.

2.“Vehicle Traffic Control Signal Heads – Light Emitting Diode (LED) Vehicular Arrow Traffic Signal

Supplement” dated January 2008 and referred to in this document as VTCSH-ARROW.

3.“Equipment and Material Standards of the ITE” dated November 1998 and referred to in this

document as VTCSH. 837.3.1 Rigid Mount Signal Head Section.

A.Provide, assemble, and install rigid mounted LED signal heads, housings, and visors in accordance

with the contract.

B.Perform wiring and electrical connections to make the signal head functional.

C.Provide a minimum of a 6 section, 12 position terminal block, capable of accepting 3 number 14

AWG spade terminal ends for each single or double section, and the middle section of a 3 section signal head assembly.

D.Install rigid mount signal assemblies on steel poles. The Department will allow placement of rigid

mount signal assemblies on wood poles for temporary signal installations. Refer to the contract for the mounting types including top, side, and rigid.

E.Place signal cable down the pole and into the cabinet base. Run the cable without splicing from

inside the signal head to the base of the pole and provide 5-feet of slack for connection. 837.3.2 Span Mount Signal Head Section.

A.Provide, assemble, and install span mounted LED signal heads, housings, and visors in accordance

with the contract.

B.Perform wiring and electrical connections to make the signal head functional.

C.Provide a minimum of a 6 section, 12 position terminal block, capable of accepting 3 number 14

AWG spade terminal ends for each single or double section, and the middle section of a section signal head assembly.

D.Place signal cable along the span, down the pole, and connect into the base. Run the cable

without splicing from inside the signal head to the base of the pole and provide 5-feet of slack for connection. 837.3.3 LED Traffic Signal Head Indication Module.

A.Remove existing LED traffic signal head indication modules and provide and install new LED traffic

signal head indication modules in existing signal heads. Use only replacement modules compatible with the housing of the existing module.

B.Perform wiring and electrical connections to make the signal head functional.

837.3.4 Signal Head Backplate.

A.Provide and install backplates in accordance with the contract.

B.Fabricate backplates as shown on the applicable detail sheet to match the required signal

configuration. 837.3.5 16-Inch LED Countdown Pedestrian Signal.

A.Provide, assemble, and install LED countdown pedestrian signal heads, visors, and housings in

accordance with the contract.

B.Perform wiring and electrical connections to make the pedestrian signal assembly functional.

C.Provide and install components and hardware listed in Section 837.2 and in the Standard

Construction Details in accordance with the contract.

D.Place cable down the pedestal or pole and connect in the base. Run the cable without splicing

from inside the pedestrian signal head to the base of the pole and provide an additional 5-feet for connection.

E.Inspect each sign location to determine if clearing is required to maintain sight lines. Clear in

accordance with Section 201 and as directed by the engineer. 837.3.6 LED Pedestrian Signal Head Indication 16-Inch Module.

A.Remove existing LED pedestrian signal head modules.

B.Provide and install new LED pedestrian signal head modules in existing pedestrian signal heads.

Use only replacement modules compatible with the housing of the existing module.

C.Perform wiring and electrical connections to make the pedestrian signal head functional.

D.Inspect each sign location to determine if clearing is required to maintain sight lines. Clear in

accordance with Section 201 and as directed by the engineer. 837.3.7 Pedestrian Pushbutton on Steel Pole with Sign.

A.Drill a 1/2-inch diameter hole in the steel pole at a height and location in accordance with the

contract. Align the cable entrance hole in the pushbutton device with the 1/2-inch diameter hole in the pole.

B.Drill and tap the steel pole for the 2 mounting bolts, using the pushbutton housing as a template.

Install the pushbutton housing using 1/4-inch x 1-inch bolts.

C.Wire the pushbutton and install on the pushbutton housing with a type and size of cable in

accordance with the contract. Run the cable without splicing from inside the pedestrian pushbutton to the base of the pole and provide an additional 5-feet for connection.

D.Install the sign supplied by the Department in accordance with the contract.

837.3.8 Rectangular Rapid Flashing Beacon (RRFB) Unit.

A.Provide, assemble, and install rectangular rapid flashing beacons (RRFBs), mounts, bracket, and

hardware in accordance with the contract.

B.Perform wiring and electrical connections to make the RRFB assembly functional.

C.Provide and install components and hardware listed in Section 837.2 and in the Standard

Construction Details in accordance with the contract.

D.Place cable down the pedestal or pole and connect in the base. Run the cable without splicing

from inside the pedestrian signal head to the base of the pole and provide an additional 5-feet for connection. 837.3.9 Realign or Slide Existing Signal Head.

A.For span wire installations, loosen saddle bolts, slide the existing signal head to a specified location

on the span wire, and re-tighten the bolts. Loosen the 2 set screws on the top side of the head and the large nut inside the door of the top section to realign span mounted signal heads. Re-tighten nut and set screws after completing realignment.

B.Loosen the mounting band brackets for mast arm installations and adjust in accordance with the

manufacturer’s instructions. Slide the signal head into the new position and re-tighten the mounting band brackets. Loosen hardware to realign mast arm mounted signal heads, and realign head and re-tighten hardware, in accordance with the manufacturer’s instructions. 837.3.10 Removal of Signal, Pedestrian Head, or Opticom Emergency Preemption Detector from Pole or Pedestal.

A.General:

1.Remove the signal head, pedestrian signal head or Opticom emergency preemption detector as

designated in the contract or as designated by the engineer.

2.Coordinate with the engineer and DelDOT Traffic for a location to drop off the traffic signal

head, pedestrian signal head, or Opticom emergency preemption detector and associated hardware.

3.Inspect the traffic signal head, pedestrian signal head, or Opticom emergency preemption

detector for damage prior to removal. Notify the engineer in writing of any damages discovered.

4.If the traffic signal head, pedestrian signal head, or Opticom emergency preemption detector or

associated hardware is damaged during removal or transportation, replace the damaged item in kind and to the satisfaction of the engineer and DelDOT Traffic. Failure to do so will result in deduction of the cost of the damaged units or parts thereof to be deducted from any payment due the Contractor.

B.Traffic Signal Head and Associated Mounting Hardware:

1.Do not damage the traffic signal head or mounting hardware. Loosen all nuts and bolts with the

appropriate tools. Disassemble the splice by removing all tapes before any signal head is removed. Only remove the wires of the cable coming from the signal head, then reinstall the wire nuts on the exposed wires of the cable left in place if directed so by the engineer. Re tape the exposed wires of the cable left in place as required in Section 832.3.D.1.c unless otherwise

directed by the engineer. Reassemble the mounting equipment, including the saddle, before returning.

C.Pedestrian Signal Head and Associated Mounting Hardware:

1.Do not damage the pedestrian signal head or mounting hardware. Disassemble the field

connections by removing wire nuts or plug on connectors before any pedestrian signal head is removed. Reinstall the wire nuts on the exposed wires of the cable left in place if directed by the engineer. Re-tape any exposed wires of the cable left in place as required in Section 832.3.D.1c unless otherwise directed by the engineer.

D.Opticom Emergency Preemption Detector and Associated Mounting Hardware:

1.Do not damage the Opticom emergency preemption detector and mount. Disassemble the field

connections by removing wire nuts or plug on connectors before any Opticom emergency preemption detector is removed. Reinstall the wire nuts on the exposed wires of the cable left in place if directed by the engineer. Re-tape any exposed wires of the cable left in place as required in Section 832.3.D.1.c unless otherwise directed by the engineer. 837.3.11 Removal of Signal Head or Opticom Emergency Preemption Detector from Span Wire or Mast Arm

A.General:

1.Remove traffic signal head or emergency Opticom detector from locations identified in the

contract or as designated by the engineer.

2.Inspect the traffic signal head or Opticom emergency detector for damage prior to removal.

Notify the engineer in writing of any damages discovered.

3.Coordinate with the engineer and DelDOT Traffic for a location to drop off the traffic signal head

or Opticom emergency detector and associated hardware.

4.Transport traffic signal head or Opticom detector, and any associated hardware, to the

prescribed location and deliver the devices in the presence of a Department representative to accept the delivery.

5.If the traffic signal head, pedestrian signal head, or Opticom emergency detector or associated

hardware is damaged during removal or transportation, replace the damaged item in kind and to the satisfaction of the engineer and DelDOT Traffic. Failure to do so will result in deduction of the cost of the damaged units or parts thereof to be deducted from any payment due the Contractor.

B.Traffic Signal Head and Associated Mounting Hardware:

1.Do not damage the traffic signal head or mounting hardware. Loosen all nuts and bolts with the

appropriate tools. Disassemble the splice by removing all tapes before any signal head is removed. Only remove the wires of the cable coming from the signal head, then reinstall the wire nuts on the exposed wires of the cable left in place, if directed so by the engineer. Re tape the exposed wires of the cable left in place as required in Section 832.3.D.1.c unless otherwise directed by the engineer. Reassemble the mounting equipment, including the saddle, before returning the system to the Department.

C.Opticom Emergency Preemption Detector and Associated Mounting Hardware:

1.Do not damage the Opticom emergency preemption detector and mount. Disassemble the field

connections by removing wire nuts or plug on connectors before removing the Opticom emergency preemption detector, the field connections must be disassembled by removing wire

nuts or plug on connectors. Reinstall wire nuts on the exposed wires of the cable left in place if directed by the engineer. Re-tape any exposed wires of the cable left in place as required in Section 832.3.D.1.c unless otherwise directed by the engineer.

837.4Method of Measurement.

A.The Department will measure the quantity of: :

1.Signal head sections as the number of signal head sections provided, assembled, installed, and

accepted. For example, a 1-way 3-section signal assembly would constitute 3 pay units.

2.LED traffic signal head indication modules as the number of modules provided, installed in an

existing signal head, and accepted.

3.Signal head backplates as the number of complete signal head backplate assemblies provided,

assembled, installed, and accepted.

4.LED countdown pedestrian signals as the number of LED countdown pedestrian signals

provided, assembled, installed, and accepted.

5.LED pedestrian signal head indications as the number of pedestrian signal head indications

provided and installed in an existing pedestrian signal housing and accepted.

6.Pedestrian pushbuttons with signs as the number of pedestrian pushbuttons provided,

assembled, installed, and accepted.

7.Existing signal heads realigned or slid as the number of existing realigned or slid signal heads

accepted.

8.RRFB units as the number of each unit provided, assembled, installed, and accepted.

9.Removal of signal or pedestrian head from pole or pedestal as each removed with mounting

hardware, returned and accepted. The assembled unit may comprise between 1 and 5 individual sections, this will be measured and paid as a single unit.

10.Removal of signal head or Opticom emergency preemption detector from span wire or mast arm

as each removed with mounting hardware, returned and accepted. Signal heads units may be comprised of between 1 and 5 individual assembled sections, the Department will consider this a single unit measured as each.

837.5Basis of Payment.

A.The Department will pay the quantity of signal head sections provided, installed, and accepted at

the contract unit price per each. Price and payment constitute full compensation for:

1.Providing and installing the signal head section;

2.housing, wiring, electrical connection, visors;

3.providing and installing the LED traffic signal head module; and

4.rigid mounting or span mounting and related hardware to provide a functioning signal assembly.

B.The Department will pay the quantity of LED traffic signal head indication modules provided,

installed, and accepted in existing signal heads at the contract unit price per each. Price and payment constitute full compensation for providing and installing the LED traffic signal head

indication in an existing signal head and removing and disposing of the existing LED module. The Department will consider removal and disposal of the replaced modules as incidental to the item.

C.The Department will pay the quantity of signal head backplates provided, assembled, installed, and

accepted at the contract unit price per each. Price and payment constitute full compensation for providing, assembling, and installing the signal head backplate and retroreflective border.

D.The Department will pay the quantity of LED countdown pedestrian signals provided, assembled,

installed, and accepted at the contract unit price per each. Price and payment constitute full compensation for:

1.Providing and installing the assembly;

2.housing;

3.wiring;

4.electrical connections;

5.visors;

6.mounting; and

7.related hardware to provide a functioning pedestrian signal.

8.The Department will pay for clearing and grubbing in accordance with Section 201. If the Bid

Proposal does not include 201000, this Work will be incidental to the pedestrian signal item.

E.The Department will pay the quantity of LED pedestrian signal head indication modules installed

and accepted in existing pedestrian signal housings at the contract unit price per each. Price and payment constitute full compensation for providing and installing the LED pedestrian signal head module in an existing pedestrian signal housing and removing and disposing of the existing LED module. The Department will consider removal and disposal of the replaced modules as incidental to the item.

1.The Department will pay for clearing and grubbing in accordance with Section 201. If the Bid

Proposal does not include 201000, this Work will be incidental to the pedestrian signal item.

F.The Department will pay the quantity of pedestrian pushbutton assemblies installed and accepted

at the contract unit price per each. Price and payment constitute full compensation for:

1.Providing, assembling, and installing the pushbutton assembly;

2.wiring;

3.electrical connection;

4.sign installation;

5.mounting; and

6.related hardware to provide a functioning pedestrian pushbutton.

G.The Department will consider the cost of control equipment necessary for the pushbutton

assemblies to operate as included in the unit price for the pushbutton assembly.

H.The Department will pay the quantity of existing signal heads, realigned or slid, and accepted at

the contract unit price per each.

I.The Department will pay for RRFB units at the contract unit price per each. Price and payment

constitute full compensation for:

1.Providing, assembling, and installing the unit;

3.supplying cable;

4.electrical connections;

5.and mounting the unit.

J.The Department will pay for removal of signal or pedestrian head from pole or pedestal at the

contract unit price per each. Price and payment will constitute full compensation for removing, retaping exposed end of cable left in place, tools and equipment, labor, transporting, testing and all necessary ancillaries.

1.The Department will make no payment for items damaged during removal or transportation.

K.The Department will pay for removal of signal head or Opticom emergency preemption detector

from span wire or mast arm at the contract unit price per each. Price and payment will constitute full compensation for removing, retaping exposed end of cable left in place, tools and equipment, labor, transporting, testing and all necessary ancillaries.

1.The Department will make no payment for items damaged during removal or transportation.

ITEM DESCRIPTION UNIT 837001 PROVIDE AND INSTALL 8” LED SIGNAL HEAD SECTION, RIGID MOUNT EA 837002 PROVIDE AND INSTALL 12” LED SIGNAL HEAD SECTION, RIGID MOUNT EA 837003 PROVIDE AND INSTALL 8” LED SIGNAL HEAD SECTION, SPAN MOUNT EA 837004 PROVIDE AND INSTALL 12” LED SIGNAL HEAD SECTION, SPAN MOUNT EA 837005 PROVIDE AND INSTALL 8” LED TRAFFIC SIGNAL HEAD INDICATION MODULE EA 837006 PROVIDE AND INSTALL 12” LED TRAFFIC SIGNAL HEAD INDICATION MODULE EA 837007 PROVIDE AND INSTALL SIGNAL HEAD BACKPLATE EA 837008 PROVIDE AND INSTALL 16” LED COUNTDOWN PEDESTRIAN SIGNAL EA 837009 PROVIDE AND INSTALL 16” LED PEDESTRIAN SIGNAL HEAD INDICATION MODULE EA 837010 PROVIDE AND INSTALL PEDESTRIAN PUSHBUTTON WITH SIGN EA 837011 REALIGN OR SLIDE EXISTING SIGNAL HEAD EA 837012 PROVIDE AND INSTALL RECTANGULAR RAPID FLASHING BEACON (SINGLE) EA 837013 PROVIDE AND INSTALL RECTANGULAR RAPID FLASHING BEACON (DOUBLE) EA 837014 REMOVAL OF SIGNAL, PEDESTRIAN HEAD, OR OPTICOM EMERGENCY PREEMPTION DETECTOR FROM POLE OR PEDESTAL EA 837015 REMOVAL OF SIGNAL HEAD OR OPTICOM EMERGENCY PREEMPTION DETECTOR FROM SPAN WIRE OR MAST ARM EA

Referenced in this section

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Source: Delaware Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 513–0 of 786. View official source ↗

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836 TRAFFIC SIGNAL POLES AND MAST ARMS

838 SPAN WIRE AND MESSENGER WIRE

837TRAFFIC SIGNAL INDICATIONS

Ask about Section 837

837.1Description.

837.2Materials.

837.3Construction.

837.4Method of Measurement.

837.5Basis of Payment.

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