2010 Construction and Material Specifications - Ohio Department of ...

807
732.05
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, nonferrous
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.