Office Of Transporation Planning Massachusetts DOT Office of Transportation Planning
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On-board Transit Signal Priority

Equipment Package: On-board Transit Signal Priority

Description: This on-board equipment package provides the capability for transit vehicles to request signal priority at signalized intersections, ramps, and interchanges through short range communication directly with traffic control equipment at the roadside.
Included In: BAT Demand Response Vehicles
BAT Fixed Route Transit Vehicles
CATA Demand Response Vehicles
CATA Fixed Route Transit Vehicles
GATRA Demand Response Vehicles
GATRA Fixed Route Transit Vehicles
LRTA Demand Response Vehicles
LRTA Fixed Route Transit Vehicles
MBTA Buses
MBTA Silver Line Vehicles
MBTA Subway/LRT Vehicles
MVRTA Demand Response Vehicles
MVRTA Fixed Route Transit Vehicles
TMA Shuttle Vehicles
Functional Requirements 1 - The transit vehicle shall determine the schedule deviation and estimated times of arrival (ETA) at transit stops.
2 - 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.
3 - 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.
4 - 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).
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