Click on a Project Inventory element from the list above to view functional requirements.
On-board Transit Signal Priority
- The transit vehicle shall determine the schedule deviation and estimated times of arrival (ETA) at transit stops.
- The transit vehicle shall send priority requests to traffic signal controllers at intersections, pedestrian crossings, and multimodal crossings on the roads (surface streets) and freeway (ramp controls) network that enable a transit vehicle schedule deviation to be corrected.
- The transit vehicle shall send the schedule deviation data and status of priority requests to the transit vehicle operator and provide the capability for the transit vehicle operator to control the priority system.
- The transit vehicle shall prevent a priority request from being sent when the transit vehicle cannot use the priority (e.g., when the transit vehicle makes a passenger stop on the approach to an intersection).
Roadway Signal Priority
- The field element shall respond to signal priority requests from transit vehicles.
TMC Multimodal Coordination
- The center shall respond to requests from transit management centers for signal priority at one or more intersections along a particular transit route.
- The center shall exchange information with transit management centers including details current transit routes, the level of service on each route, and the progress of individual vehicles along their routes.
TMC Signal Control
- The center shall remotely control traffic signal controllers.
Transit Center Signal Priority
- The center shall analyze transit vehicle schedule performance to determine the need for priority along certain routes or at certain intersections.
- The center shall send requests for priority along routes or at intersections to traffic management.
- The center shall define business rules that govern use of transit vehicle signal priority, communicate these rules to the transit vehicle, and monitor transit vehicle requests for priority at signalized intersections.
- The center shall provide transit operations personnel with the capability to control and monitor transit signal priority operations.
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