DRAFT Sacramento Regional ITS Architecture


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Equipment Package: On-board Transit Signal Priority

Description: This equipment package provides the capability for transit vehicles to request signal priority through short range communication directly with traffic control equipment at the roadside.
Included In: Paratransit Vehicle
Regional Transit Bus Vehicle
Regional Transit LRT Vehicle
Roseville Transit Vehicles
Processes: 4.1.2.1 - Determine Transit Vehicle Deviation and ETA
4.1.2.2 - Determine Transit Vehicle Corrective Instructions
4.1.2.5 - Request Transit Vehicle Priorities
4.1.3 - Provide Transit Vehicle Location Data
User Service Requirements: 2.0 - PUBLIC TRANSPORTATION MANAGEMENT
2.1.0 - ITS shall include a Public Transportation Management (PTM) function.
2.1.1 - PTM shall include an Operation of Vehicles and Facilities (OVF) function that provides computer assisted control of the operation of vehicles and their associated facilities.
2.1.1.1 - To enable the automation of the vehicle and facilities operations OVF shall provide the capability to gather the needed data to include, but not be limited to, the following:
2.1.1.1(d) - Drive-line operating condition.
2.1.1.1(f) - Real-time vehicle location reports.
2.1.1.2 - OVF shall include a Command and Control (CC) capability.
2.1.1.2.1 - CC shall provide the capability for real-time Vehicle Command and Control (VCC).
2.1.1.2.1.1 - VCC shall provide the capability to compare received information with predetermined operating condition specifications and note any deviations.
2.1.1.2.1.4 - VCC shall provide the capability to automatically issue corrective instructions to the operator including, but not limited to, the following:
2.1.1.2.2 - When CC detects a vehicle(s) has deviated from schedule it shall provide the capability to automatically determine the optimum scenario for returning the vehicle or fleet to schedule.
2.1.1.2.3 - CC shall include an integrated traffic control capability that provides traffic signal preemption when required for schedule adjustment to Transit Vehicles at traffic signals (i.e., centralized or distributed).
2.1.1.2.4 - CC shall include the capability for its computational capabilities to be located either on-vehicle and/or at remote locations.
2.1.2 - PTM shall include a Planning and Scheduling Services (PSS) function to automate the planning and scheduling of public transit operations.
2.1.2.2 - The PSS shall include a Schedule Generation capability.
2.1.2.2.1 - The PSS Schedule Generation function shall collect data for schedule generation including, but not limited to, the following:
2.1.2.2.1(a) - Route segment running-time.
2.1.2.2.1(b) - Passenger loading at each stop.

Last updated: 04-29-05