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(APTS09-7)

Scroll down to view the service package description, list of elements, responsible agencies (stakeholders), candidate functional areas and requirements, and flows on this diagram.

Service Package Description

This service package determines the need for transit priority on routes and at certain intersections and requests transit vehicle priority at these locations. The signal priority may result from limited local coordination between the transit vehicle and the individual intersection for signal priority or may result from coordination between transit management and traffic management centers. Coordination between traffic and transit management is intended to improve on-time performance of the transit system to the extent that this can be accommodated without degrading overall performance of the traffic network.

List of Elements on this Diagram
Click on Element Name to go to Element Detail Page.

Element Name Stakeholder

Town of Gilbert TMC Town of Gilbert

Town of Gilbert Traffic Signals Town of Gilbert

Valley Metro OCC Valley Metro

Valley Metro Transit Vehicles Valley Metro

Element Name	Stakeholder
Town of Gilbert TMC	Town of Gilbert
Town of Gilbert Traffic Signals	Town of Gilbert
Valley Metro OCC	Valley Metro
Valley Metro Transit Vehicles	Valley Metro

List of Stakeholder Elements and Roles on this Diagram
Click on Element Name to go to Page with Element Details.
Click on Functional Area/Role to go to Page with Candidate Functional Requirements.

Stakeholder Element Name Functional Area/Role Functional Area Description

Town of Gilbert Town of Gilbert TMC TMC Signal Control This equipment package provides the capability for traffic managers to monitor and manage the traffic flow at signalized intersections. This capability includes analyzing and reducing the collected data from traffic surveillance equipment and developing and implementing control plans for signalized intersections. Control plans may be developed and implemented that coordinate signals at many intersections under the domain of a single traffic management subsystem and are responsive to traffic conditions and adapt to support incidents, preemption and priority requests, pedestrian crossing calls, etc.
Town of Gilbert Town of Gilbert Traffic Signals Roadway Signal Priority This equipment package includes the field elements that receive signal priority requests from transit vehicles approaching a signalized intersection. The request for priority may or may not be granted, based on the overall traffic situation at the intersection, adherence to the schedule of the transit vehicle, etc. If priority is granted, the operation of the traffic signal is adjusted to give an early green indication or hold a green indication that is already displaying
Valley Metro Valley Metro OCC Transit Center Signal Priority The equipment package monitors transit schedule performance and generates requests for transit priority on routes and at certain intersections. This equipment package may coordinate with the Traffic Management Subsystem to provide transit priority along the selected route. It also coordinates with the Transit Vehicle Subsystem to monitor and manage local transit signal priority requests at individual intersections.
Valley Metro Valley Metro Transit Vehicles On-board Transit Signal Priority 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.

Stakeholder	Element Name	Functional Area/Role	Functional Area Description
Town of Gilbert	Town of Gilbert TMC	TMC Signal Control	This equipment package provides the capability for traffic managers to monitor and manage the traffic flow at signalized intersections. This capability includes analyzing and reducing the collected data from traffic surveillance equipment and developing and implementing control plans for signalized intersections. Control plans may be developed and implemented that coordinate signals at many intersections under the domain of a single traffic management subsystem and are responsive to traffic conditions and adapt to support incidents, preemption and priority requests, pedestrian crossing calls, etc.
Town of Gilbert	Town of Gilbert Traffic Signals	Roadway Signal Priority	This equipment package includes the field elements that receive signal priority requests from transit vehicles approaching a signalized intersection. The request for priority may or may not be granted, based on the overall traffic situation at the intersection, adherence to the schedule of the transit vehicle, etc. If priority is granted, the operation of the traffic signal is adjusted to give an early green indication or hold a green indication that is already displaying
Valley Metro	Valley Metro OCC	Transit Center Signal Priority	The equipment package monitors transit schedule performance and generates requests for transit priority on routes and at certain intersections. This equipment package may coordinate with the Traffic Management Subsystem to provide transit priority along the selected route. It also coordinates with the Transit Vehicle Subsystem to monitor and manage local transit signal priority requests at individual intersections.
Valley Metro	Valley Metro Transit Vehicles	On-board Transit Signal Priority	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.

List of Flows on this Diagram
Click on Architecture Flow to go to Page with Applicable ITS Standards.

Source Element Architecture Flow Destination Element

Valley Metro OCC transit system data Town of Gilbert TMC

Valley Metro OCC traffic control priority request Town of Gilbert TMC

Town of Gilbert Traffic Signals signal control status Town of Gilbert TMC

Town of Gilbert Traffic Signals right-of-way request notification Town of Gilbert TMC

Town of Gilbert TMC traffic control priority status Valley Metro OCC

Town of Gilbert TMC request transit information Valley Metro OCC

Valley Metro Transit Vehicles transit vehicle schedule performance Valley Metro OCC

Valley Metro Transit Vehicles local signal priority request Town of Gilbert Traffic Signals

Last updated: 06-24-13