Traffic/transit/system monitoring
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This includes monitoring of:
- Freeway, arterial, and transit conditions, using loop detector data from Caltrans' Performance Measurement System (PeMS) and data feeds from commercial data providers (including probe and other sensor data)
- Control devices (signal status, ramp metering data, etc.)
- Travel demand (origin-destination patterns)
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Decision support
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At the heart of the ICM system is a Decision Support System (DSS) that:
- Takes the information gathered from monitoring systems
- Estimates current traffic conditions
- Identifies events, incidents, bottlenecks, etc.
- Develops strategies to respond to identified problems
- Uses simulation and modeling to forecast near-future conditions under alternative scenarios and evaluate potential strategies
- Recommends the best strategy to implement
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System interfaces
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System interfaces are needed to communicate with:
- Existing traffic monitoring systems
- System operators, so all participants see the same things
- Traveler information systems (e.g., changeable message signs, HAR, mobile), to alert travelers to traffic conditions and the options available to them
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