Traffic Illumination, Traffic Signals, and Intelligent Transportation Systems (ITS)
Traffic: Illumination, Traffic Signals and Intelligent Transportation Systems (ITS)
Requirements and standards for highway lighting systems, traffic signal systems, intelligent transportation systems (ITS), including related electrical equipment and roadside power distribution systems.
Accessible Pedestrian Signals (APS) are traffic signal system devices which combine a pedestrian detector - commonly a pushbutton - with pedestrian signal indications in non-visual formats. These non-visual indications are both audible and tactile. Because there is a tactile indication, APS pushbuttons are now required in locations where there may have never been a pushbutton before - usually because the existing system does not require pedestrian detection (automatic walk signal).
All APS units for WSDOT signal systems must include speech messages. In order to provide a consistent message format throughout the state, speech messages must follow the APS Sample Message Table (pdf 456 kB), which is to be used in concurrence with General Special Provision (GSP) 8-20.2(9-29.19).OPT1.FR8 (PDF 204KB).
LED Luminaire ANSI/NEMA Labeling
LED luminaires used in WSDOT systems are classified by their high pressure sodium (HPS) wattage equivalent (see <new link pending>). Consistent with this classification system, luminaire labels use a modified version of the standard ANSI/NEMA C136.15 label.