Interface: City of Ridgeland Signal Preemption - City of Ridgeland Traffic Signals
Information Flow Definitions
intersection control status (Existing)
Status data provided by the traffic signal controller including phase information, alarm status, and priority/preempt status.
passive vehicle monitoring coordination (Existing)
The direct flow of information between field equipment. This includes control commands used to control detection systems that rely on infrastructure–based identification of individual vehicles to measure travel times and other related measures by identifying the same vehicle at different points in the network. Related technologies include Bluetooth readers and license plate recognition systems. The coordination also includes sharing of time stamped identifiers that identify the vehicles that have passed through a detection zone.
signal preemption request (Existing)
Direct request for preemption to a traffic signal controller that results in preemption of the current control plan and grants right–of–way to the requesting vehicle. This flow identifies the required phase and timing of the preemption. This flow may also cancel the preemption request (e.g., when the requesting vehicle clears the intersection).