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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 Multimodal Crossing provides the operational status and pending requests for right-of-way from marine traffic at the drawbridge (multimodal crossing status) to the Traffic Management Subsystem and Roadway equipment.
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The Roadway equipment can in turn request an opening of the draw bridge (request for right-of-way) for a marine vessel.
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The Traffic Management Subsystem can configure, download timings and otherwise control (signal control data) signal equipment along the roadway to control traffic approaching a drawbridge. Traffic Management Subsystem can monitor the status of this equipment (signal control status). Signals can be used to stop vehicular traffic for a draw bridge opening. Additionally, this equipment can supply information on the current status of the traffic control equipment indicating right-of-way availability to marine traffic at the drawbridge (highway control status) to the Multimodal Crossing.
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The Traffic Management Subsystem controls (roadway information system data) the equipment such as DMS and HAR on the Roadway that provides information (driver information) including the current status of the drawbridge and time of planned openings to Drivers.
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The Traffic Management Subsystem continues asynchronous monitoring (roadway information system status) of this equipment.
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The Traffic Management Subsystem can share the current and/or expected status of the drawbridge (road network conditions) with an Information Service Provider.
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