A REPORT ON THE ACCURACY OF TRAFFIC ASSIGNMENT WHEN USING CAPACITY RESTRAINT

THE ACCURACY OF THE TRAFFIC ASSIGNMENT PROCESS WHEN CAPACITY RESTRAINT IS USED IN THE URBAN TRANSPORTATION PLANNING PROCESS WAS EVALUATED. A BRIEF EXPLANATION OF THE CAPACITY RESTRAINT PROCEDURE IS GIVEN TO PROVIDE THE NEEDED BACKGROUND INFORMATION. DATA OBTAINED FROM 10 URBAN TRANSPORTATION STUDIES ARE USED TO EVALUATE THE ADEQUACY OF THE TRAFFIC ASSIGNMENT PROCESS TO MATCH EXISTING TRAVEL PAT- TERNS. THIS EVALUATION IS MADE ON THE BASIS OF FIVE TESTS WHICH MEASURE THE DIFFERENCES BETWEEN GROUND COUNT VOLUMES AND ASSIGNED VOLUMES. THE RESULTS OF THE EVALUATION INDICATE THAT THE TRAFFIC ASSIGNMENT PROCESS CAN MATCH GROUND COUNTS WITHIN PLUS OR MINUS 15 PERCENT ON LINKS CARRYING VOLUMES GREATER THAN APPROXIMATELY 5,000 VEHICLES. THE MOST ACCURATE RESULTS ARE OBTAINED BY USING THE AVERAGE ASSIGNED VOLUMES FROM THREE OR FOUR ITERATIONS OF CAPACITY RESTRAINT. /AUTHOR/

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  • Supplemental Notes:
    • Paper sponsored by Committee on Origin and Destination and presented at the 46th Annual Meeting. 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:
    • Humphrey, Thomas F
  • Publication Date: 1967

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 53-75
  • Monograph Title: Origin and destination characteristics
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00227647
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:36AM