phase; interval; traffic signal phase

part of a traffic signal cycle during which, signal indications are stable and do not change
NOTE 1 to entry: In the SPaT message, the current timing value for the remaining interval time estimate, as well as the anticipated interval for yellow change (clearance) interval, is provided for each lane.
NOTE 2 to entry: Because signal interval times commonly change based on triggering events in many types of signalling systems, the value provided in the SPaT message may represent a minimal value that is extended and updated as the message is re-transmitted in real time.

Application Area: Cooperative systems