ESTIMATION OF SUB-MODAL SPLIT WITHIN THE TRANSIT MODE

RIDERS DIVERTED FROM SURFACE TRANSIT COMPRISE THE BULK OF PATRONS ON NEW CENTRAL-CITY RAPID TRANSIT LINES. EFFECTIVE ESTIMATION OF SUBMODAL SPLIT IS OF MAJOR IMPORTANCE TO RAPID TRANSIT PATRONAGE FORECASTING. THE ESTIMATION OF SUBMODAL SPLIT FOR THE NATIONAL CAPITAL TRANSPORTATION AGENCYS INITIAL SUBWAY SYSTEM IS DESCRIBED. DATA FROM SKOKIE, ILLINOIS MASS TRANSPORTATION DEMONSTRATION PROJECTS WERE USED TO CONSTRUCT A LOGISTICS CURVE SUBMODAL SPLIT RELATIONSHIP WHICH COMPARED SATISFACTORILY WITH PREVIOUS DATA. WEIGHTED EXCESS TIMES WERE INTRODUCED TO REPRESENT TRAVEL CONVENIENCE IN CURVE DERIVATION AND IN TRANSIT COMPUTER NETWORK CODING. OVERALL ALTERNATE TRAVEL TIMES WITH EXCESS TIME WEIGHTING OF 2.5 APPEARED TO BE SUFFICIENT INPUT TO PREDICT SUBMODAL SPLIT ADEQUATELY. ANALYSIS TECHNIQUES USED A COMBINATION OF SPECIAL COMPUTER PROGRAMS AND STANDARD TRAFFIC ASSIGNMENT PROGRAMS TO COMPUTE SUBMODAL SPLIT FOR A 580 TRAFFIC ZONE SYSTEM. THE RESULTANT DIVERSION ANALYSIS WAS FOUND VERY SENSITIVE TO THE ASSUMED RAPID AND SURFACE TRANSIT ROUTINGS AND HEADWAYS. RESULTS INDICATED USE OF ALL- OR-NOTHING ASSIGNMENT FOR DIVERSION COMPUTATION WOULD NOT HAVE PROVIDED THE ACCURACY REQUIRED FOR THE NCTA STUDY. /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:
    • Pratt, Richard H
    • Deen, Thomas B
  • Publication Date: 1967

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 20-30
  • Monograph Title: Origin and Destination Characteristics
  • Serial:

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Filing Info

  • Accession Number: 00227644
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:36AM