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The source graphic, a Windows Metafile (WMF), for the TSDs can be downloaded here:
TSD Part 1,
TSD Part 2,
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 process is under the asynchronous monitoring and control of the Emergency System Operator. In the initial steps of this process, the Emergency System Operator represents the call-taker, who interacts with callers, monitors alarms, and other incident reports (emergency operations status) and enters incident information into the system to support incident tracking and response (emergency operations inputs).
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Incidents are reported by the public through the Emergency Telecommunications System (incident notification), including a description of the incident and information about the caller. This represents the Public Safety Answering Point’s (PSAPs) interface to 911 and other emergency access numbers. The Emergency System Operator interacts with the caller, collecting additional information and verifying the information provided and providing an indication of incident response status back to the caller (incident notification response).
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Transit Management can notify Emergency Management about incidents associated with the transit system (transit emergency data).
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If Traffic Management permits, the Emergency Management subsystem can control the field surveillance equipment (remote surveillance control) associated with a Traffic Management subsystem (e.g., pan, tilt, and zoom). Traffic images are returned that contain the product of that surveillance (traffic images). These images may be used by the call-taker to verify the incident location and gather additional information about the incident.
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Reported incident information is provided to the appropriate dispatcher based on location and the nature of the reported incident (incident report). This incident report may represent a positive hand-off of an incident between two systems in scenarios where the call-taker and dispatcher are on different systems, or it may represent the providing of incident information between peer response agencies. As a response is dispatched, incident response information is shared with the call-taker (incident response coordination) so that accurate response information can be conveyed back to the caller. In the case of peer response agencies the incident response coordination allows response coordination between the agencies.
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Like the call-taking process described in the previous steps, the dispatch process is also under the continuous asynchronous monitoring (emergency operations status) and control (emergency operations inputs) of the Emergency Systems Operator, representing the dispatcher in the final steps of this process. Note that the call-taker and dispatch positions may be operated by the same person, by different people in the same communications center, or by different people in different communications centers.
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An incident report is provided to the Emergency Management Subsystem, representing communication to the Computer-Aided Dispatch system. As a response is dispatched, incident response information is shared with other Emergency Management Subsystems, supporting coordinated dispatch in mutual aid scenarios and other scenarios where more than one agency is supporting the incident response (incident response coordination).
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One or more units are dispatched to the reported incident (emergency dispatch requests) and the information is made available to the emergency personnel in the vehicle (emergency personnel information presentation). Emergency personnel may confirm the dispatch request (emergency personnel inputs), which is relayed to the Emergency Management Subsystem (emergency dispatch response). In addition, vehicle location (emergency vehicle tracking data) is relayed to the Emergency Management Subsystem to facilitate dispatch of the vehicle.
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The Emergency Management Subsystem can keep its mapping system current by subscribing to a map update service. Map updates are provided on request (map update request) to support CAD system operation and facilitate interoperability between CAD systems.
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