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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 monitors current transit vehicle location using an Automated Vehicle Location System. The location data may be used to determine real time schedule adherence and update the transit system’s schedule in real-time. Vehicle position may be determined either by the vehicle (e.g., through GPS) and relayed to the infrastructure or may be determined directly by the communications infrastructure. A two-way wireless communication link with the Transit Management Subsystem is used for relaying vehicle position and control measures. Fixed route transit systems may also employ beacons along the route to enable position determination and facilitate communications with each vehicle at fixed intervals. The Transit Management Subsystem processes this information, updates the transit schedule and makes real-time schedule information available to the Information Service Provider.

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

Element Name	Stakeholder
Valley Metro OCC	Valley Metro
Valley Metro Transit Vehicles	Valley Metro
Valley Metro NextRide	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
Valley Metro	Valley Metro OCC	Transit Center Vehicle Tracking	This equipment package monitors transit vehicle location. The location information is collected via a data communication link between the transit vehicles and the transit center. The location information is presented to the transit operator on a digitized map of the transit service area. The location data may be used to determine real time schedule adherence and update the transit system’s schedule in real-time. The real-time schedule information is provided to Information Service Providers and the Transit Center Information Services equipment package, which furnish the information to travelers.
Valley Metro	Valley Metro Transit Vehicles	On-board Transit Trip Monitoring	This on-board equipment package tracks vehicle location, monitors fuel usage, collects operational status (doors opened/closed, running times, etc.) and sends the collected, time stamped data to the Transit Management Subsystem.

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 Transit Vehicles	transit vehicle schedule performance	Valley Metro OCC
Valley Metro Transit Vehicles	transit vehicle location data	Valley Metro OCC
Valley Metro OCC	transit schedule adherence information	Valley Metro NextRide

Last updated: 06-24-13