Interface: SANDAG Connected Vehicle Field Equipment - Rail Grade Wayside Warning Systems
Information Flow Definitions
intersection control status (Planned)
Status data provided by the traffic signal controller including phase information, alarm status, and priority/preempt status.
signal preemption request (Planned)
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).