ATMS19-Speed Warning and Enforcement Transaction Set Diagram



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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.

Note that this transaction set diagram (TSD) is only 1 of the 3 TSDs and so only a portion of the numbered items below refer to the above TSD.

ATMS19 transaction set diagrams: 1 2 3 Next TSD

  1. The Maintenance and Construction Management Subsystem (MCMS) can monitor vehicle speeds on a roadway. Speed monitoring is critically important in construction zones where maintenance personnel are working. The MCMS configures and controls automated speed monitoring, speed warning, and speed enforcement systems (speed monitoring control) on the Roadway.

  2. Equipment on the Roadway measures traffic volume, speed, density and other characteristics (traffic characteristics). Equipment can identify specific vehicles and their speeds (vehicle characteristics). The current weather and roadway conditions (environmental conditions), which can impact the speed limit, are also monitored.

  3. The equipment on the Roadway used for speed monitoring and enforcement can be coordinated with signs, signals, and Field-Vehicle Communications equipment (roadway equipment coordination) through peer-to-peer, master-slave or other configurations.

  4. Drivers can be notified (driver information) en-route of their speed through signs, signals or other equipment on the Roadway. Alternatively, Field-Vehicle Communications can be used to send current speed information and warnings to the vehicle for presentation to the driver (vehicle signage data).

  5. The MCMS monitors the speed monitoring system status including current operational state and logged information including measured speeds, warning messages displayed, and violation records (speed monitoring information).

  6. The entire process is under the monitoring (maint and constr operations information presentation) and control (maint and constr center personnel inputs) of Maintenance and Construction Center Personnel.

  7. The MCMS can request speed enforcement (request for enforcement) from the Enforcement Agency when needed to address safety issues in a work zone or other special situations.

  8. The Traffic Management Subsystem can also monitor speeds on roadways. The Traffic Management Subsystem would configure and control automated speed monitoring, speed warning, and speed enforcement systems (speed monitoring control) on the Roadway.

  9. Equipment on or along the Roadway measures traffic volume, speed, density and other characteristics (traffic characteristics). Equipment can identify specific vehicles and their speeds (vehicle characteristics). The current weather and roadway conditions (environmental conditions), which can impact the speed limit, are also monitored.

  10. The equipment on the Roadway used for speed monitoring and enforcement can be coordinated with signs, signals, and Field-Vehicle Communications equipment (roadway equipment coordination) through peer-to-peer, master-slave or other configurations.

  11. Drivers can be notified (driver information) en-route of their speed through signs, signals or other equipment on the Roadway. Alternatively, Field-Vehicle Communications can be used to send current speed information and warnings to the vehicle for presentation to the driver (vehicle signage data).

  12. The Traffic Management Subsystem monitors the speed monitoring system status including current operational state and logged information including measured speeds, warning messages displayed, and violation records (speed monitoring information).

  13. The entire process is under the monitoring (traffic operator data) and control (traffic operator inputs) of Traffic Operations Personnel.

  14. The Traffic Management Subsystem can request speed enforcement (request for enforcement) from the Enforcement Agency when needed to address safety issues or other special situations.

  15. Speed monitoring can also be performed by an Enforcement Agency. The Enforcement Agency would configure and control automated speed monitoring, speed warning, and speed enforcement systems (speed monitoring control) on the Roadway.

  16. Equipment can identify specific vehicles and their speeds (vehicle characteristics). The current weather and roadway conditions (environmental conditions), which can impact the speed limit, are also monitored.

  17. The equipment on the Roadway used for speed monitoring and enforcement can be coordinated (roadway equipment coordination) through peer-to-peer, master-slave or other configurations.

  18. The Enforcement Agency monitors the speed monitoring system status including current operational state and logged information including measured speeds, warning messages displayed, and violation records (speed monitoring information).

  19. The Enforcement Agency would be notified when a speed violation (traffic violation notification) was detected by equipment on the Roadway.