Link Type: Wide-Area Wireless

Transit Management Center --> Transit Vehicle OBE:
transit schedule information

Definitions

transit schedule information (Information Flow): Current and projected transit schedule information used to initialize the transit vehicle with a vehicle assignment, monitor schedule performance, and develop corrective actions on-board.

Transit Management Center (Source Physical Object): The 'Transit Management Center' manages transit vehicle fleets and coordinates with other modes and transportation services. It provides operations, maintenance, customer information, planning and management functions for the transit property. It spans distinct central dispatch and garage management systems and supports the spectrum of fixed route, flexible route, paratransit services, transit rail, and bus rapid transit (BRT) service. The physical object's interfaces allow for communication between transit departments and with other operating entities such as emergency response services and traffic management systems.

Transit Vehicle OBE (Destination Physical Object): The Transit Vehicle On-Board equipment (OBE) resides in a transit vehicle and provides the sensory, processing, storage, and communications functions necessary to support safe and efficient movement of passengers. The types of transit vehicles containing this physical object include buses, paratransit vehicles, light rail vehicles, other vehicles designed to carry passengers, and supervisory vehicles. It collects ridership levels and supports electronic fare collection. It supports a traffic signal prioritization function that communicates with the roadside physical object to improve on-schedule performance. Automated vehicle location enhances the information available to the transit operator enabling more efficient operations. On-board sensors support transit vehicle maintenance. The physical object supports on-board security and safety monitoring. This monitoring includes transit user or vehicle operator activated alarms (silent or audible), as well as surveillance and sensor equipment. The surveillance equipment includes video (e.g. CCTV cameras), audio systems and/or event recorder systems. It also furnishes travelers with real-time travel information, continuously updated schedules, transfer options, routes, and fares. In CVRIA, a separate 'Vehicle OBE' physical object supports the general V2V and V2I safety applications and other applications that apply to all vehicles, including transit vehicles. The Transit Vehicle OBE supplements these general capabilities with capabilities that are specific to transit vehicles.

Included In

This Information Flow is in the following Applications:

This Information Flow is in the following Application Objects:

Communication Diagrams

The communication diagram(s) can be viewed in SVG or PNG format and the current format is SVG. Switch to PNG format.


This profile describes applicable IETF JSON and W3C web browser standards (e.g., HTML5 and Web Sockets) for transmissions over wide area wireless communications.




This profile describes applicable XML and W3C web services standards used in transmissions over wide area wireless communications.




This profile describes applicable ASN.1 standards used in transmissions over wide area wireless communications.




This profile describes an alternative set of standards used in vehicle communications where one or more RSEs act as a gateway with the vehicle as destination.





Characteristics

Architectural:

Characteristic Value
Time Context Recent
Spatial Context Local
Acknowledgement False
Cardinality Unicast
Initiator Destination

Security

This information flow triple is in the following applications with the following security levels.

Information Flow Security
Application Confidentiality Integrity Availability
Basis Basis Basis
Transit Signal Priority Low Moderate Moderate
This information is not sensitive. It is generally made public, to support transit system functionality. This data contains the vehicle assignment. It should be accurate, and not easily modified. However, the bus drivers will have some knowledge about what a reasonable configuration is, and should be able to notice any unusual configurations, such as all busses being a #27. This information is necessary for the TSP to work correctly. A few missed messages will not have a large impact. The Transit Management Center needs to know if the TV OBE does not receive the message, so it can resend it.