Physical Object: Transit Vehicle OBE

Transit Vehicle Signal Priority


'Transit Vehicle Signal Priority' provides the capability for transit vehicles to determine eligibility for priority and request signal priority at signalized intersections, ramps, and interchanges through short range communication with traffic control equipment at the roadside.

This functional object is included in the "Transit Vehicle OBE" physical object.

This functional object is included in the following service packages:

This functional object is mapped to the following Functional View PSpecs:


# Requirement
01 The transit vehicle shall determine the schedule deviation and estimated times of arrival (ETA) at transit stops.
02 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.
03 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.
04 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).


Currently, there are no standards associated with the functional object itself though the interfaces may have standards associated with them.