Coordination of Traffic Signals Information for the Local Impacts Committee

The following terms are used when discussing traffic signal coordination: Phase – a predetermined set of traffic signal movements that operate concurrently. Cycle time – the total time taken to run once through all phases for an intersection. Offset – For coordinated traffic signals the beginning or end of the green period on the coordinated approach of each intersection is set to occur a given time relative to that at the reference intersection. This time is known as the offset.