IMPLEMENTATION OF OPERATIONAL NETWORK EQUILIBRIUM PROCEDURES

Operational network equilibrium procedures are being developed for the fixed-demand single-mode case. The basis of these procedures is described in the light of the historical development of approaches to the problem of predicting equilibrium flows in transportation networks. The procedures are described as capacity restraint methods that have the following advantages overtraditional approaches: On each iteration, improvement of the solution is ensured; and following each iteration, a measure that indicates the maximum amount of error remaining can be calculated. This paper describes network equilibrium procedures being made operational as a part of the UMTA Transportation Planning System. These procecures are described in light of their theoretical and mathematical background. Although significant theoretical work has been done on the variable-demand network equilibrium problem, the first developmental step being taken is to provide an efficient fixed-demand equilibrium procedure. It is expected, however, that expansion to the variable-demand case will be possible within the general algorithmic framework being developed. The paper begins by stating the general (variable-demand) network equilibrium problem. This problem is then formulated mathematically, and the nature of its solution is discussed. Previous work to develop efficient solution techniques is discussed. The results of much of the previous work are summarized as a general equilibrium algorithm for the fixed-demand problem. Finally, based on this general algorithm, current development work is described.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1974/491/491-004.pdf
• Summary URL:
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• Supplemental Notes:
  • Publication of this paper is sponsored by Committee on Transportation Systems Design. 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:
  • Ruiter, Earl R
• Conference:
  • 53rd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1974-1-21 to 1974-1-25
• Publication Date: 1974

Media Info

• Media Type: Digital/other
• Features: Appendices; References;
• Pagination: pp 40-51
• Monograph Title: Interactive graphics and transportation systems planning
• Serial:
  • Transportation Research Record
  • Issue Number: 491
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Algorithms; Capacity restraint; Demand; Mathematical analysis; Theory; Traffic flow; Transportation planning; Urban transportation
• Subject Areas: Highways; Planning and Forecasting;

Filing Info

• Accession Number: 00260929
• Record Type: Publication
• ISBN: 0309022797
• Files: TRIS, TRB
• Created Date: Oct 11 1974 12:00AM