Dynamic scheduling, a new approach to network control, is evaluated by simulation techniques. Although this approach was the concept of synchronous slots, it does not use preprogramming or origin-destination slot reservations as is common to many schemes. Rather it uses a combination of path reservations through interchanges (as each one is approached) and maneuvering-space reservations (for the next interchange). Control tasks concerned with individual vehicles (e.g., scheduling and maneuvering) are handled at the local level, and those concerned with vehicles in the aggregate (e.g., lane flow distribution and entrance flow control) are handled at the central level. Dynamic scheduling was evaluated by simulations of a variety of networks including directional interchanges, entrance-exit interchanges in a loop, and a 12-interchange urban network. The findings are that (a) flow rates through interchanges will, in general, be limited by the interactions among vehicles maneuvered on the approach lanes; (b) a traveler's expected total longitudinal maneuvering delay and its dispersion increase with both the level of demand on the system and the number of interchanges traversed; and (c) based on simulated egress flow restrictions, blockages appear to be effectively handled by this approach. /Author/

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    • This paper appears in Dual Mode Transportation, which is a publication containing the proceedings of a conference conducted by the Transportation Research Board, May 29-31, 1974. 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
  • Corporate Authors:

    Transportation Research Board (TRB)

    Washington, DC   
  • Authors:
    • Rule, Ronald G
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  • Publication Date: 1976

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  • Accession Number: 00149250
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 15 1977 12:00AM