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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.
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The Commercial Vehicle Check subsystem (located at the roadside) detects the presence and possibly weight of a commercial vehicle passing the station (CVO weight and presence).
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The Commercial Vehicle Check subsystem collects identification information from the vehicle (e.g. vehicle ID, carrier ID and driver ID).
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The Commercial Vehicle Check subsystem uses roadside sensors to monitor for and detect physical evidence of security sensitive HAZMAT coming from the vehicle's Freight Equipment (hazmat environmental factors). This could be, for example, radiation from the Freight Equipment (cargo, trailer, container, or chassis) or traces of ammonia (indicating a possible explosive) emanating from the cargo area or imaging and image analysis of the freight equipment using various imaging technologies.
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The Commercial Vehicle Check subsystem collects the commercial vehicle’s credentials information, received from the Commercial Vehicle Administration subsystem. These credentials might be collected before the detection of the commercial vehicle being examined (and stored locally) or in real time after the identification information is received.
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Based on the information collected, the Commercial Vehicle Check subsystem determines if security sensitive hazmat material has been detected, and if so, is it associated with a permitted activity. If security sensitive hazmat is detected, and it is not associated with a permitted activity, then the Commercial Vehicle Check subsystem issues a message to the commercial vehicle to stop at the inspection station. This message can be sent via the Commercial Vehicle Subsystem for in-vehicle signage (pass/pull-in) and/or directly to the Commercial Vehicle Driver as a dynamic message sign (CVO pass/pull-in message).
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If the vehicle does not stop, or in the case of a positive identification of an un-permitted security sensitive hazmat cargo, then a message (alarm) is sent from the Commercial Vehicle Check subsystem to the Emergency Management agency with jurisdiction, e.g. local or state police, to coordinate a traffic stop or some other action with respect to the offending commercial vehicle.
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