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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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To obtain information about traffic in reversible lanes, the Traffic Management Subsystem can control (traffic sensor control) and monitor (traffic flow) sensors in or along the roadway. It also monitors (signal control status and freeway control status) and controls (signal control data and freeway control data) traffic on surface streets and freeways using equipment on the Roadway. The equipment includes signals, automated signs, message signs, etc. that are used to direct traffic on roadways with reversible lanes. The Traffic Management Subsystem also monitors the current reversible lane status and the operational status of the reversible lane control equipment (reversible lane status). The TMS controls (reversible lane control) equipment including sensory functions that detect wrong-way vehicles and other special surveillance capabilities that mitigate safety hazards associated with reversible lanes. This equipment on the Roadway can be coordinated (roadway equipment coordination) with other equipment such as traffic signals, ramp meters, DMS, etc. through peer-to-peer, master-slave or other configurations.
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The entire process is under the asynchronous monitoring (traffic operator data) and control (traffic operator inputs) of Traffic Operations Personnel.
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