Article 1 — Description
1.1 Installation . Fabricate, furnish, and install vehicle and pedestrian signal heads.
1.2 Removal . Remove existing vehicle and pedestrian signal heads.
Article 2 — Materials
Provide new materials as shown on the plans and in accordance with this Item .
2.1 Definitions.
2.1.1 Back Plate. A thin strip of material extending outward from all sides of a signal head.
2.1.2 Light -Emitting Diode ( LED) Optical Unit . The LED lens and associated supporting parts in a signal section.
2.1.3 Louver . A device mounted to the visor restricting signal face visibility.
2.1.4 Signal Section . One housing case, housing door, visor, and optical unit.
2.1.5 Signal Face. One section or an assembly of two or more sections facing one dir ection.
2.1.6 Signal Head . A unidirectional face or a multidirectional assembly of faces, including back plates and louvers
when required, attached at a common location on a support.
2.2 General . Provide vehicle signal heads in accordance with DMS -11121 , “Twelve -Inch LED Traffic Signal
Lamp Unit.” Provide prequalified vehicle signal heads from the Department’s MPL. Provide pedestrian signal heads in accordance with DMS -11131 , “Pedestrian LED Count down Signal Modules.” Provide prequalified pedestrian signal heads from the Department’s MPL. Supply either aluminum or polycarbonate signal head components of the same material and manufacturer for any one project. Use galvanized steel, stainless steel, o r dichromate sealed aluminum bolts, nuts, washers, lock washers, screws, and other assembly hardware. When dissimilar metals are used, ensure the metals are selected or insulated to prevent corrosion. Use closed -cell silicone or closed -cell neoprene gasket s.
Article 3 — Construction
3.1 Assembly. Assemble individual signal sections in multi -section faces in conformance with the
manufacturer’s recommendations to form a rigid signal face. Assemble and mount signal heads, louvers, and back plates as shown on the plans to the mounting hardware or in conformance with the manufacturer’s recommendations . Close any openings in an assembled signal head with a plug of the same material and color as the head. 932 3.2. Wiring . Wire each optical unit to the terminal block located in that signal section using solderless wire connectors or binding screws and spade lugs. Wire all sections of a m ulti-section signal face to the section terminal blocks in which the traffic signal cable is terminated. Maintain the color coding on leads from the individual optical units throughout the signal head, except for the traffic signal cable. Use solderless wi re connectors or binding screws and spade lugs for connections to terminal blocks. Use binding screws and spade lugs for field wiring. The traffic signal cable will not be stripped until it has passed into the location that requires termination.
3.3 Installation. Install the signal head assemblies, as shown on the plans or as directed, to the required signal mast arm or pole. A drip loop is required when passing between signal hardware, as shown on the plans or as directed.
3.4 Removal . Remove the existing item as shown on the plans or as directed. Ensure the items designated for
salvage are removed in a manner to avoid undue stress or damage. When the removed item leaves an opening, cover the opening with similar material to an equivalent condition. When the removed item leaves an unused signal cable, remove the cable. When the removed item leaves unused conductors within a signal cable still in use, trim back and tape off to ensure no electrical shorts by unused conductors.
Article 4 — Measurement
This Item will be measured by each vehicle signal section, pedestrian signal section, back plate, louver , or head assembly installed or removed.
Article 5 — Payment
The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for the installation or removal of the “Pedestrian Signal Section,” “Vehicle Signal Section,” “Back Plate,” “Louver,” or “Head Assembly,” of the types and sizes specified.
5.1 Installation . This price is full compensation for furnishing, fabricating, assembling, and installing the signal
sections, back plates and louvers, and lenses and optics; mounting attachments; and materials, equipment, labor, tools, and incidentals.
5.2 Removal . This price is full compensation for removing, salvaging, disassembling, and stockpiling vehicle or
pedestrian signal head components removed as shown o n the plans or as directed.