Transit Management Center --> Transit Vehicle OBE:
vehicle automation commands

Definitions

vehicle automation commands (Information Flow): Direction to an automated driving system to perform vehicle control actions

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 support 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. A separate 'Vehicle OBE' physical object supports the general vehicle safety and driver information capabilities that apply to all vehicles, including transit vehicles. The Transit Vehicle OBE supplements these general capabilities with capabilities that are specific to transit vehicles.

This Triple is an instantiation of the more general triple:

Included In

This Triple is in the following Service Packages:

This triple is associated with the following Functional Objects:

This Triple is described by the following Functional View Data Flows:

  • None

This Triple has the following triple relationships:

None

This Triple is an instantiation of the more general triple:

Communication Solutions

  • No communications solutions identified.

    • This Triple is an instantiation of the more general triple:

    Characteristics

    CharacteristicValue
    Time Context Now
    Spatial Context Regional
    Acknowledgement True
    CardinalityUnicast
    InitiatorSource
    AuthenticableTrue
    EncryptTrue


    InteroperabilityDescription
    RegionalInteroperability throughout the geopolitical region is highly desirable, but if implemented differently in different transportation management jurisdictions, significant benefits will still accrue in each jurisdiction. Regardless, this Information Flow Triple should be implemented consistently within a transportation jurisdiction (i.e., the scope of a regional architecture).

    This Triple is an instantiation of the more general triple:

    Security

    Information Flow Security
      Confidentiality Integrity Availability
    Rating Moderate Moderate Moderate
    Basis Vehicle commands should result in vehicle movement, which is directly observable. There may be instances where remote monitoring of these instructions enables a nefarious use case, which suggests a MODERATE level of obfuscation is reasonable, as the impact is likely limited to a single vehicle with no safety impact. This flow directs vehicle movement, so needs to be unaltered lest the vehicle behave unexpectedly. There must always be a fallback for a driveable vehicle though, suggesting MODERATE at most. Availability will depend on the parking structure; in some cases this will be MODERATE, in others LOW, depending on how much automated movements facilitate parking opreations.


    Security CharacteristicsValue
    AuthenticableTrue
    Encrypt True