ESTIMATING A ROAD-USER COST FUNCTION FROM DIVERSION CURVE DATA

A THEORY AND METHODOLOGY ARE PRESENTED FOR ESTIMATING A ROAD-USER COST FUNCTION USING DIVERSION CURVE DATA. THE THEORY OF DIVERSION CURVES IS PRESENTED AS BEING A PROBABILITY DENSITY FUNCTION WITH NORMAL DISTRIBUTION. THE POINT IN THE DENSITY FUNCTION ASSOCIATED WITH A GIVEN PROPORTION OF FREEWAY USAGE IS RELATED TO A GENERALIZED COST DIFFERENCE EQUATION DESCRIBING THE COMPARATIVE COSTS OF USING THE FREEWAY AS OPPOSED TO THE BEST ALTERNATE THE PARAMETERS OF THE COST FUNCTION ARE THEN DERIVED USING REGRESSION TECHNIQUES. THE ROAD-USER COST EQUATION DERIVED FROM THIS ANALYSIS AGREES QUITE WELL WITH THEORETICAL PREDICTIONS AND WITH RESULTS OBTAINED FROM OTHER STUDIES WHERE RELATIONSHIPS BETWEEN THE VARIOUS COMPONENTS OF ROAD- USER COST AND SPEED OF TRAVEL HAVE BEEN DERIVED AND PRICED OUT TO OBTAIN A USER COST FUNCTION. THIS GENERAL AGREEMENT OF RESULTS IMPLIES THAT DRIVERS TEND TO BEHAVE IN A COST-CONSCIOUS MANNER AND THAT THE COST FUNCTION OF THE AVERAGE DRIVER APPROXIMATES THAT OBTAINED FROM THE PRICING STUDIES. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 47-54
  • Monograph Title: Engineering economy
  • Serial:

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Filing Info

  • Accession Number: 00201127
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 7 1994 12:00AM