CONSISTENCY IN TRANSPORTATION MODAL-SPLIT AND EVALUATION MODELS

AN EVALUATION OF TRAVELER BENEFITS ASSOCIATED WITH TRANSPORTATION SYSTEM ALTERNATIVES IS PRESENTED. IT IS ASSERTED THAT THE DIFFERENT STEPS IN THE TRANSPORTATION PLANNING PROCESS, WHICH ARE CARRIED OUT BY MODELS THAT REPRESENT TRAVEL BEHAVIOR, ARE FREQUENTLY NOT CONSISTENT WITH ONE ANOTHER AND THAT EVALUATION OF TRAVELER BENEFITS, WHICH IS THE LAST STEP IN THE PROCESS, MAY PROVIDE FURTHER INCONSISTENCY. THESE INCONSISTENCIES MAY LAD TO ERRONEAOUS CONCLUSIONS REGARDING THE RELATIVE DESIRABILITY OF ONE SYSTEM OVER ANOTHER. A UNIFIED APPROACH TO MODAL SPLIT AND EVALUATION CALCULATION IS PRESENTED AND DEMONSTRATED IN THE CONTEXT OF THREE SPECIFIC MODAL- SPLIT MODELS-LINEAR, LOGIT, AND IMPEDANCE FRACTION. TWO SPECIFIC MTHODS OF CALCULATION OF BENEFITS ARE PRESENTED, ONE BASED ON PROBABILITY THEORY AND ONE BASED ON A MODIFIED CONSUMER'S SURPLUS FORMULATION. AN OVERALL PROCEDURE FOR DEMAND MODEL DEVELOPMENT AND EVALUATION CALCULATIONS IS OUTLINED. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 61-72
  • Monograph Title: Planning and Evaluation of Transportation Systems
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00241527
  • Record Type: Publication
  • ISBN: 0309019605
  • Files: TRIS, TRB
  • Created Date: Oct 3 1971 12:00AM