An improved traffic assignment and control model--CORCON--has been applied to a real freeway corridor. This model is capable of predicting traffic behavior in a freeway corridor by assigning time-varying origin-destination demand to the freeway mainline and the surrounding network streets. The impact of queueing behavior on the selection of minimum-cost travel paths is incorporated by using a flexible traffic-diversion model. Because all or a portion of the traffic may be diverted from a particluar queueing path, the effects of freeway-entrance-ramp control on adjacent roadway systems can be investigated. The model was calibrated and validated by using 15-min volume, travel time, and queueing data collected during the 2-h morning peak period on a section of the Queen Elizabeth Way freeway corridor for typical before-control and after-control periods. The calibration resulted in an overall correspondence of 3 to 5 percent, and the validation process predicted average traffic behavior within 5 to 10 percent of actual behavior. The testing was considered very successful because the model was shown to be capable of predicting with reasonable accuracy flows, queues, and travel times on a freeway and adjacent street network. /Authors/

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    • Publication of this paper sponsored by Committee on Freeway Operations.Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Allen, Brian L
    • Easa, Said M
    • Case, E R
  • Conference:
  • Publication Date: 1978

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 76-84
  • Monograph Title: Urban system operation and freeways
  • Serial:

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Filing Info

  • Accession Number: 00196604
  • Record Type: Publication
  • ISBN: 0309028272
  • Files: TRIS, TRB
  • Created Date: Sep 15 1979 12:00AM