Congestion Control in Freeway Corridors: The IMIS System
This paper describes a traffic control system design for congestion control in freeway corridors. The system has a hierarchical structure. A corridor level control acts in a supervisory capacity dynamically allocating traffic among alternative corridor facilities, such as freeways, frontage roads and signalized arterials. A local level control then selects control parameters for the individual facilities based on the predicted usage at the corridor level. A user specified performance function is optimized in the process.
Extensive simulation testing was conducted to verify algorithm performance and evaluate potential system benefits. A prototype system named IMIS (Integrated Motorist Information System), which is based on this design, is now being implemented in Long Island, New York.
KeywordsTraffic Flow Congestion Control Link Cost Variable Message Sign Freeway Corridor
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