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

732.04
Each LED signal lamp unit shall have a label placed on the unit certifying
compliance to ITE standards for color and luminance.
d. The LED traffic signal lamp unit shall be a single, self-contained device,
not requiring on-site assembly for installation into an existing traffic signal
housing.
e. The assembly and manufacturing process for the LED traffic signal lamp
unit assembly shall be such as to assure all internal LED and electronic
components are adequately supported to withstand mechanical shock and vibration
from high winds and other sources.
f. The lens of the LED signal lamp unit shall be capable of withstanding
ultraviolet light (direct sunlight) exposure for a minimum time period of five years
without exhibiting evidence of deterioration.
g. Ensure that lenses will withstand a 3.5 foot (1.0 meter) drop test, are a
minimum of 1/8 inch (3 mm) thick, and are free of bubbles and imperfections.
The lenses shall be smooth on the outside with no external facets to prevent dirt
and debris build up.
h. Each LED traffic signal lamp unit shall comprise a UV stabilized
polymeric outer shell, multiple LED light sources, and a regulated power supply.
i. If red or yellow lenses are tinted, they shall match the wavelength
(chromaticity) of the LED. Do not furnish green tinted lenses.
j. An optical assembly shall diffuse the light output and provide uniform
illumination across the entire surface of the lens and eliminate the visibility of the
individual LEDs to the observer. The optical assembly shall be used for all ball
modules and shall be optional on arrow and pedestrian modules.
k. The LED traffic signal lamp unit shall be designed for universal
installation in both span wire and standard/stationary pole mount applications.
l. The Arrow pattern produced by the Arrow LED traffic signal lamp units
shall conform to the VTCSH standard for color, size and shape. The Arrow LED
traffic signal lamp units shall not require a specific orientation or have a variance
in light output, pattern or visibility for any mounting orientation.
m. LED pedestrian signal lamp units shall be designed as a retrofit
replacement, modular or screw in unit for the message bearing surface of a 12"
(300 mm) pedestrian traffic signal, type A-2, housing built to the PTCSI - part 2
Standard.
n. The LED pedestrian signal lamp unit shall fit into existing pedestrian
signal housings without the need to modify the housing. Installation of the retrofit
replacement LED pedestrian signal lamp unit into an existing 12"(300 mm)
pedestrian signal housing shall only require the removal of the existing message
bearing surface, existing lamp components (i.e. lens, lamp module, gaskets, and
reflector) and insertion of the retrofit replacement into the area once occupied by
the removed assembly.
o. The single pedestrian module shall be designed to display a full HAND
icon and a full” Walking “Person icon that complies with PTCSI standards for this
(icon) symbol for the size specified.
p. LED traffic signal lamp units shall be visible at 450 feet (137 meters)
during sway conditions (extended view) until obscured by the visor.
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