EVALUATION OF ALTERNATIVE TRANSPORTATION INVESTMENT DECISIONS: MODIFICATION AND USE OF A MULTIREGIONAL INPUT- OUTPUT MODEL

AN ADDITIONAL TECHNIQUE FOR EVALUATION OF ALTERNATIVE TRANSPORTATION INVESTMENT STRATEGIES IS DESCRIBED. THIS TECHNIQUE INVOLVES THE MODIFICATION OF A GRAVITY PARAMETER MULTIREGIONAL INPUT-OUTPUT MODEL. IN A GRAVITY PARAMETER MODEL, THE VOLUME OF SHIPMENTS BETWEEN TWO REGIONS IS SPECIFIED AS A FUNCTION OF DEMAND IN THE IMPORTING REGION, PRODUCTION IN THE EXPORTING REGION, AND TOTAL PRODUCTION IN ALL REGIONS. THE GRAVITY MODEL BECOMES USEFUL FOR ANALYSIS OF TRANSPORTATION INVESTMENT WHEN IT IS MODIFIED TO ALLOW PREDICTION OF REGIONAL ECONOMIC EFFECTS FROM INVESTMENT. THIS RESEARCH PROJECT FOCUSED ON A CASE STUDY IN HIGHWAY INVESTMENT--THE NATIONAL SYSTEM OF INTERSTATE AND DEFENSE HIGHWAYS. AVAILABILITY OF A SPECIAL TABULATION OF THE 1963 COMMODITY TRANSPORTATION SURVEY PERMITTED REGRESSION ANALYSIS OF THE RELATIONSHIP BETWEEN QUALITY OF HIGHWAYS AND VALUE OF TRADE PARAMETERS IN THE GRAVITY MODEL. THE AUTHORS PRESENT THE FORMULATION OF AN AUGMENTED GRAVITY PARAMETER MODEL BASED ON THE REGRESSION ANALYSIS. THE AUGMENTED MODEL OFFERS POTENTIAL FOR ESTIMATING SHIFTS IN ECONOMIC ACTIVITY AMONG REGIONS AND INCREASES IN THE DEMAND FOR TRANSPORTATION. PRELIMINARY RESULTS SHOW THAT A SIMPLER VERSION OF THE MULTIREGIONAL INPUT- OUTPUT MODEL--ONE BASED ON CONSTANT REGIONAL IMPORTS-- IS A GOOD SUBSTITUTE FOR THE MORE COMPLEX GRAVITY TRADE VERSION. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 133-141
  • Monograph Title: Planning and Evaluation of Transportation Systems
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202008
  • Record Type: Publication
  • ISBN: 0309019605
  • Files: TRIS, TRB
  • Created Date: Oct 3 1971 12:00AM