APTS01-Transit Vehicle Tracking (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.

Service Package Graphic

Transit Center Vehicle TrackingOn-board Transit Trip MonitoringTransit ManagementMap Update ProviderLocation Data SourceInformation Service ProviderTransit VehicleBasic Transit VehicleTraffic Managementmap update requesttransit schedule adherence informationtransit vehicle location datamap updatestransit vehicle schedule performancetransit vehicle measuresposition fixtransit probe datatransit probe data

Get the Source Graphic, a Windows Metafile (WMF), in ZIP format.
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Includes Equipment Packages and Subsystems:

Associated Planning Factors and Goals

Planning Factor Goal
D. Increase the accessibility and mobility of people and for freight; Enhance mobility, convenience, and comfort for transportation system users
G. Promote efficient system management and operation; Increase operational efficiency and reliability of the transportation system

Associated Objective Categories

Objective Category
Transit Operations and Management: Transit Signal Priority
Traveler Information: Data Collection and Sharing on Travel Conditions

Associated Objectives and Performance Measures

Objective Performance Measure
Decrease delay by X percent per year by increasing the use of queue jumping and automated vehicle location. Travel time delay on routes with queue jumping and automated vehicle location in use.
Increase the percent of modes in the region that share their traveler information with other modes in the region to 100 percent by Y year. Percent of modes in the region that share their traveler information with other modes.
Increase the percent of the transportation system in which travel conditions can be detected remotely via CCTV, speed detectors, etc. to X percent by Y year. Percent of the transportation system in which travel conditions can be detected remotely via CCTV, speed detectors, etc.
Increase the percent of transportation facilities whose owners share their traveler information with other agencies in the region to X percent by Y year. Percent of transportation facilities whose owners share their traveler information with other agencies in the region.

 
Since the mapping between objectives and service packages is not always straight-forward and often situation-dependent, these mappings should only be used as a starting point. Users should do their own analysis to identify the best service packages for their region.

Related ITS Applications of ITS Taxonomy

Classification Category ITS Application Area ITS Application(s)
Intelligent Infrastructure Transit Management Operations & Fleet Management Automatic Vehicle Location / Computer-Aided Dispatch

User Services related to this Service Package:

User Service
2.1 Public Transportation Management
2.4 Public Travel Security

Transaction Set Diagram





The source graphic, a Windows Metafile (WMF), for the TSD can be downloaded here: TSD

The following discusses how the National ITS Architecture provides the transportation service described by this service package. Each numbered item describes the operation of that portion of the service package identified with the corresponding number on the transaction set diagram.

  1. The entity Location Data Source sends the flow position fix to the Transit Vehicle Subsystem (TRVS). The location information is passed along to the Transit Management Subsystem (TRMS) via the architecture flow transit vehicle location data. This architecture flow also contains automated vehicle mileage and fuel usage reporting, which are collected in the TRVS through the flow transit vehicle measures from the Basic Transit Vehicle. Finally, the estimated times of arrival and anticipated schedule deviations are sent from the TRVS to the TRMS in the flow transit vehicle schedule performance.

  2. As part of vehicle tracking the TRMS will convert the location data received from the TRVS into some map-based representation. An interface to a Map Update Provider is available to keep this map-based representation of the transportation network current. The implied operation of this interface is for the TRMS to request a map update (map update request), and the Map Update Provider to electronically provide the update (map updates).

  3. Information about transit vehicle location and schedule adherence is provided as part of the flow transit schedule adherence information. This information may be requested by the ISP or provided periodically or as needed by the TRMS.

  4. It is also possible to use the location and tracking services on equipped transit vehicles equipped as probes. The Transit Management Subsystem can provide the Traffic Management Subsystem and/or an Information Service Provider with information on probe vehicles (transit probe data).