Dynamic control and traffic performance in a freeway corridor: a simulation study |
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Institution: | 1. Centre for Stem Cell Biology, Department of Biomedical Science, The University of Sheffield, Western Bank, Sheffield S10 2TN, UK;2. Centre for Signal Processing and Complex Systems, Department of Automatic Control and Systems Engineering, The University of Sheffield, Western Bank, Sheffield S10 2TN, UK;3. Department of Materials Science and Engineering, The University of Sheffield, Western Bank, Sheffield S10 2TN, UK;1. Department of Civil Engineering, University of Messina, Italy;2. Department of Civil Engineering, University of Salerno, Italy |
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Abstract: | This paper describes simulation studies that were conducted to assess the performance of a freeway corridor control system. The system combines an advanced traffic management system with a motorist information system that provides route guidance to individual drivers. It has a hierarchical structure: The corridor level control acts in a supervisory capacity dynamically allocating traffic among alternative corridor facilities, including freeways, frontage roads, and signalized arterials. The 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. Both recurrent and nonrecurrent congestion scenarios were simulated using the SCOT model as a test bed. It is shown that, in most cases, significant benefits in performance can be obtained when the system operates as designed. |
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