signal preemption request
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).
| Source | Flow | Destination |
|---|---|---|
| Roadside Equipment | signal preemption request | ITS Roadway Equipment |