Traffic Management

Traffic Management project sponsors may choose to consider the following functions when defining functional requirements for a specific project. A typical traffic management project is able to:

• collect, process, digitize, and send traffic sensor data (speed, volume, and occupancy) to the center(s) for further analysis and storage, under center control.
• collect, process, and send traffic images to the center(s) for further analysis and distribution.
• return ramp metering controller, mainline meters, and lane control operational status to the controlling center(s).
• provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center(s).
• remotely control systems to manage use of the freeways, including ramp meters, mainline metering, lane controls, and variable speed limits.
• collect operational status from ramp meters, mainline metering, and lane controls and compare against the control information sent by the center.
• exchange traffic information with other traffic management centers, includes incident information, congestion data, traffic data, signal timing plans, and real-time signal control information.
• remotely monitor and control traffic signal controllers.
• implement control plans to coordinate signalized intersections, under control of center personnel, based on data from sensors and surveillance monitoring traffic conditions, incidents, emergency vehicle preemptions, transit signal priority, the passage of commercial vehicles with unusual loads, equipment faults, pedestrian crossings, etc.
• maintain parking lot information including static information such as hours of operation, rates, location, entrance locations, capacity, type, and constraints; as well as dynamic information such as current state of the lot, occupancy, arrival rates, and departure rates.
• monitor and diagnose field equipment remotely to detect failures, issue problem reports, and track the repair or replacement of the failed equipment.
• detect, analyze, reduce, and verify collected data from traffic surveillance equipment.
• provide transportation information to TMCs, PeMS, or traveler information databases and websites (such as 511).
• manage reversible lanes.
• support joint control of field devices.
• process traffic data for advisory messages.
• provide traffic broadcast messages to devices such as CMS and HAR.
• provide web based traveler information system.
• provide Information Service Providers with a transportation information data interface.
• collect tolls electronically from toll tags.
• coordinate with central toll collection administration (Caltrans, GGBHTD).
• operate central toll collection administration (MTC/BATA).
• operate and maintain toll collection and monitoring equipment.
• provide the capability to implement variable pricing structures.
• process electronic toll collection without the customer stopping. 
• provide a confirmation of the toll transaction to each customer and record images of violators.
• provide the capability to expand real-time traffic management equipment to monitor traffic conditions and incidents.