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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.
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Either periodically or as hazmat cargo is loaded/unloaded, the Freight Equipment container, chassis or trailer can report the hazmat elements of the bill-of-lading included (freight equipment information) to the Commercial Vehicle Subsystem. In turn, the Commercial Vehicle Subsystem provides this information to the Fleet and Freight Management Subsystem. Alternatively, the Freight Equipment can independently report the information directly to the Fleet and Freight Management Subsystem.
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On an asynchronous basis, current vehicle location is monitored by the Commercial Vehicle Subsystem (position fix).
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The Commercial Vehicle Subsystem can send a HAZMAT message, which includes vehicle location data, to the Emergency Management Subsystem (hazmat spill notification). The information is forwarded to the Emergency System Operator (as part of emergency operations status).
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Alternately, HAZMAT information can be requested by the Vehicle Subsystem (commercial vehicle data request) from the Commercial Vehicle Subsystem. In response to the previous request, the Commercial Vehicle Subsystem will send HAZMAT information to the Vehicle Subsystem (commercial vehicle data). However, the Commercial Vehicle Subsystem can alternatively send HAZMAT information to the Vehicle Subsystem on an asynchronous basis (commercial vehicle data).
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If the Vehicle Subsystem determines a HAZMAT incident has occurred, it will send a request for emergency assistance to the Emergency Management Subsystem (emergency notification). The request will be forwarded to the Emergency System Operator (as part of emergency operations status). The Emergency System Operator will initiate a response to the request for emergency assistance (as part of emergency operations inputs. The Emergency Management Subsystem will acknowledge this request for emergency assistance and provide additional details regarding actions and verification requirements (emergency acknowledge). In certain circumstances, the Emergency Management Subsystem can request additional information from the Vehicle Subsystem (emergency data request). The Commercial Vehicle Subsystem will respond with the specified information (as a part of emergency notification).
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To obtain additional HAZMAT information, the Emergency Management Subsystem can request (hazmat information request) information about the HAZMAT load from the Fleet and Freight Management Subsystem, which may include the nature of the load and unloading instructions (hazmat information)
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