RESUME OF AASHO REPORT ON ROAD USER BENEFIT ANALYSES

ANY ECONOMIC ANALYSIS OF A PROPOSED HIGHWAY IMPROVEMENT MUST INCLUDE AN APPRAISAL OF THE EXPECTED BENEFITS TO BE DERIVED FROM THE PROJECT, AS COMPARED TO THE ESTIMATED COST OF THE IMPROVEMENT. IN THE AASHO REPORT, A BENEFIT-COST RATIO IS DESCRIBED. THIS RATIO REPRESENTS THE AMOUNT OF SAVINGS TO HIGHWAY USERS FOR EACH DOLLAR INVESTED IN THE HIGHWAY FACILITY. THE BASIC FORMULA CALLS FOR THE COMPUTATION OF HIGHWAY COSTS AND ROAD USER COSTS, FROM WHICH ROAD USER BENEFITS CAN BE DETERMINED. THIS METHOD WHICH INCLUDES A SYSTEMATIC SUMMATION OF ESTIMATED COSTS AND A LOGICAL MEANS FOR COST ITEMS PROVIDES A SOUND APPROACH FOR MAKING A ROUTINE ECONOMIC ANALYSIS OF A PROPOSED CONSTRUCTION PROJECT. THE ESTIMATED COST TO THE ROAD USERS ARE COMPUTED BY ESTABLISHING THE UNIT COSTS PER MILE, WHICH ARE MULTIPLIED BY THE AVERAGE ANNUAL TRAFFIC VOLUME FOR THE ANALYSIS PERIOD, AND THE TOTAL LENGTH OF THE ANALYSIS SECTION. UNIT OPERATING COSTS ARE AFFECTED BY THE FOLLOWING FACTORS: (1) TYPE OF HIGHWAY DESIGN, TYPE AND CONDITION OF SURFACE, (2) TYPE OF TRAFFIC OPERATION (FREE, NORMAL OR RESTRICTED), (3) SPEED, (4) GRADIENTS, (5) CURVATURE, AND (6) TYPE OF VEHICLE. HIGHWAY COSTS ARE COMPUTED ON AN ANNUAL BASIS AND THEY INCLUDE THE AMORTIZED ANNUAL COST OF CONSTRUCTION AND ANNUAL MAINTENANCE CHARGES. COST-BENEFIT RATIOS ARE USED TO APPRAISE THE SOUNDNESS OF A PROPOSED HIGHWAY INVESTMENT OR TO AID IN THE SELECTION OF AN ALTERNATE LOCATION OR DESIGN. THE PROCEDURES OUTLINED ARE INTENDED TO PROVIDE ONLY ONE INDICATION OF THE SOUNDNESS OF AN INVESTMENT OR THE ADVANTAGES OF ONE LOCATION AND DESIGN ALTERNATE OVER ANOTHER. SPECIFIC CHANGES TO REFLECT THE INCREASES IN CERTAIN UNIT PRICES SINCE 1952 ARE BEING PROPOSED FOR A CURRENT REPUBLICATION OF THE REPORT. THESE CHANGES INCLUDE THE FOLLOWING: GASOLINE, OIL, DEPRECIATION, MAINTENANCE AND REPAIRS, AND TIME.

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  • Supplemental Notes:
    • pp 36-42 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:
    • Loutzenheiser, D W
    • Walker, W P
    • Green, F H
  • Discussers:
    • Burch, James S
    • Rothrock, C A
    • Lochner, Harry
    • Moskowitz, Karl
    • Newcomb, Robinson
    • Blensly, Robert C
  • Conference:
  • Publication Date: 1960

Media Info

  • Monograph Title: ECONOMIC ANALYSIS IN HIGHWAY PROGRAMMING, LOCATION AND DESIGN: WORKSHOP CONFERENCE PROCEEDINGS, SEPTEMBER 17, 1959
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00201866
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 26 1970 12:00AM