100 general provisions

4. Environmental Requirements

a. Green and red LED traffic signal lamp units shall be rated for use in the ambient operating temperature range of -40 F to +166 F (-40 C to +74 C). Yellow signal lamps shall be rated at a range of -13 F to +77 F (-25 C to +25 C).

b. The unit shall consist of a housing that is a sealed watertight enclosure that eliminates dirt contamination and allows for safe handling in all weather conditions. The LED signal lamp unit shall be sealed against dust and moisture intrusion per the requirements of NEMA Standard 250-1991 for Type 4 enclosures to protect all internal LED and electrical components.

5. Documentation Requirements. Each LED traffic signal lamp unit shall be provided with the following documentation:

a. Installation instructions.

b. The manufacturer name, brand and model number of all LEDs used shall be provided, along with the LED manufacturer=s recommended drive current and degradation curves.

6. Warranty. The LED signal lamp unit shall be repaired or replaced by the manufacturer if it exhibits a failure due to workmanship or material defects within the first 60 months of field operation.

The LED signal lamp unit shall be repaired or replaced by the manufacturer if, when operating over the specified operating ambient temperature and voltage ranges, the unit does not meet or exceed all minimum luminous intensity requirements as defined in the ITE (Institute of Transportation Engineers) LED Purchase Specification - Vehicle Traffic Control Signal Heads (VTCSH), Part 2: Light Emitting Diode (LED) Vehicle Traffic Signal Modules dated June 2005 during the first 60 months of field operation.

The measured chromaticity coordinates of LED signal lamp units shall conform to the requirements for chromaticity in Section 4.2 and Figure 1 of the ITE VTCSH and the PTCSI over the temperature range provided in the Specifications for the duration of the warranty period.

The manufacturer shall provide a written warranty against defects in materials, workmanship and luminous intensity for LED signal lamp units for a period of 60 months after installation of LED signal lamp units. Replacement LED signal lamp units shall be provided within 10 days after receipt of failed LED signal lamp units at no cost, except the cost of shipping the failed units.

An LED pedestrian signal lamp unit shall be repaired or replaced by the manufacturer if the signal lamp unit does not attract the attention of, or is not readable to, a viewer (both day and night) at all distances from 10 feet (3 meters) to the full width of the area to be crossed when operated over the specified operating ambient temperature and voltage ranges.

Furnish materials according to the Department’s Qualified Products List (QPL).

732.05 Pedestrian Signal Heads. Furnish pedestrian signal heads that conform to the ITE Pedestrian Traffic Control Signal Indications. Furnish signal heads that are complete units made up of two optical compartments with no leakage of light from one compartment to another. Ensure that the signal heads alternately display the symbol of an upraised hand in portland orange and the symbol of a walking person in white light. Do not furnish outline style symbols. Furnish material for housings that consist of cast or sheet, corrosion resistant, non-ferrous metal. Adequately reinforce the housings. Ensure that the lens frames are non-ferrous metal or polycarbonate material.

Ensure that the lenses are glass or ultraviolet and impact-resistant plastic and display the legend with translucent symbols within an opaque black background.

Seal the lens to the door frame by the use of a weatherproof seal. Furnish an elastomeric gasket between the door frame and housing to ensure a dust and weatherproof seal.

Use a signal head design that provides adequate dissipation of heat to ensure rated lamp life.

Ensure that the reflectors distribute light evenly from the source to the lens and are fastened or fitted securely in the compartment. Furnish reflectors made of highly specular finished aluminum, silvered glass, porcelainized steel, or break resistant silvered plastic. Finish reflector material to preserve the original reflective properties.

Fit each compartment of pedestrian signal heads with a visor that is at least 7 inches (175 mm) in length or, in lieu of visors, protect the entire face with a sunshade fastened close to the lens. Furnish a black grid sunshade fabricated of high impact resistant plastic with a nominal depth of 1 1/2 inches (38 mm) and consisting of horizontal members spaced at not more than 1/2-inch (13 mm) and vertical members spaced appropriately.

Furnish pedestrian signal heads with required mounting brackets. Furnish either pipe type brackets or, when compatible with the mounting position required by the plans, two-piece hinged type brackets that support the signal head close to the pole.

Furnish 1 1/2-inch (38 mm) galvanized steel pipe brackets with necessary fittings and adapters, and that are one-way or two-way as required. Orient the signal face to crosswalks by selective meshing of serration rings or other devices provided on housings and mounting brackets. Make adjustment in increments not greater than 5 degrees of rotation and that is not affected by wind gusts when locked.

Furnish two-piece hinged brackets of cast aluminum with stainless steel hinge pins, and when closed will be secured by a tamperproof bolt. Ensure that the mounting incorporates a terminal block for quick disconnect of field wiring. Ensure that the mounting design permits attachment to the pole by banding, bolting or by lag screws in the case of wood poles.

Paint signal exterior surfaces black with enamel paint. Paint interior surfaces of visors flat black.

Furnish pedestrian signal head types according to Table 732.05-1.

Table 732.05-1
Signal Head Type	Symbol Height, Inches, (mm)	Light Source
A1 A2	6 (152) 9 (229)	Clear lamp Incandescent, LED
D2	9 (229)	Clear lamp Incandescent, LED