Pedestrian Signal Head Visibility Performance Requirements and Testing Procedures
M.D. Finley, A.J. Holick
Despite the widespread use of light emitting diodes (LEDs) in pedestrian signal heads, concerns exist about the lack of clear, consistent visibility performance requirements upon which to base purchase specifications. This report summarizes research conducted by the Texas Transportation Institute (TTI) to develop measurable visibility performance requirements for pedestrian signal heads, as well as test methods to verify compliance with these requirements.
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