A SIMPLIFIED TRIP-DISTRIBUTION MODEL FOR THE ESTIMATION OF URBAN TRAVEL

A MEANS OF ESTIMATING URBAN TRAVEL IS PROPOSED TO REDUCE THE TIME AND COST OF LOCAL TRANSPORTATION PLANNING STUDIES. A TRIP-DISTRIBUTION MODEL, WHICH IS A MODIFICATION OF A GRAVITY MODEL DEVELOPED BY J. C. TANNER OF THE BRITISH ROAD RESEARCH LABORATORY, IS STUDIED. THE PRINCIPAL VARIABLES IN THIS MODEL ARE A MEASURE OF THE ACTIVITY WITHIN EACH ZONE OF THE STUDY AREA AND A MEASURE OF THE RESISTANCE TO TRAVEL BETWEEN EACH PAIR OF ZONES. A COMBINATION OF RESIDENT POPULATION AND EMPLOYMENT IS USED FOR THE ACTIVITY MEASUREMENT, AND BOTH STRAIGHT-LINE DISTANCE AND MINIMUM OFF-PEAK DRIVING TIME IS USED FOR THE RESISTANCE MEASUREMENT. SEVERAL DIFFERENT FORMS OF THE MODEL ARE INVESTIGATED INCLUDING A UNIFORM RESISTANCE FUNCTION, RING VARIATIONS OF THE PARAMETERS, AND THE ADDITION OF TERMINAL TIME TO THE RESISTANCE MEASUREMENT. ORIGIN-DESTINATION DATA ARE USED FROM A 1962 SURVEY IN PUELBO, COLORADO (POPULATION 108,243). THE ABILITY OF THE MODEL TO SIMULATE THE ACTUAL TRAVEL PATTERNS IS BASED ON ROOT-MEAN-SQUARE ERROR ANALYSIS. MINIMUM ROOT-MEAN-SQUARE ERROR GAVE THE BEST ESTIMATES OF THE ORIGIN-DESTINATION DATA AS SUBSTANTIATED BY SCREEN-LINE CROSSING COUNTS, TRIP-LENGTH FREQUENCY DISTRIBUTION, AND PERCENTAGE OF ROOT-MEAN-SQUARE ERROR. IN ALL CASES, THE USE OF TRAVEL RESISTANCE BASED ON STRAIGHT-LINE DISTANCE GAVE BETTER RESULTS THAN THE USE OF MINIMUM DRIVING TIME. THIS WAS BECAUSE OF LAND USE CHARACTERISTICS OF THE URBAN AREA, SUCH AS VERY CENTRALIZED SHOPPING, BUSINESS, AND WORK CENTERS WITHIN THE STUDY AREA. /AUTHOR/

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  • Supplemental Notes:
    • Paper sponsored by Committee on Origin and Destination, 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:
    • Lund, John W
  • Publication Date: 1969

Media Info

  • Media Type: Print
  • Features: Figures; Tables;
  • Pagination: pp 1-14
  • Monograph Title: Improvements in the transportation planning process
  • Serial:

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Filing Info

  • Accession Number: 00227955
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Mar 9 1982 12:00AM