APPROACH TO MEASUREMENT OF MODAL ADVANTAGE

Shipper preferences for truck or rail were determined by using shipment mass and distance as criteria. Data on individual manufactured commodities from the 1972 Census of Transportation Commodity Transportation survey were arranged in a matrix-table format and analyzed for the extent of involvement by these primary modes in carrying cargo of various weight brackets moving over a series of distance blocks. As expected, trucks dominated the movement of lighter weight shipments and rails dominated the movement of heavy shipments. Competition, or involvement by both modes, was limited to cargo in the medium-weight range, which was not an extensive amount. Amounts of cargo either modally dominated or competitive were determined and correlated to actual overall percentages of cargo by mode. Changes in overall modal percentages of cargo over time have a strong relationship to changes in the size of shipments over time, although not as strong and direct a relationship for the rail mode as for trucking. Major shifts of cargo between modes will not occur in the absence of artificial or arbitrary obstacles to market forces.

Media Info

  • Media Type: Print
  • Features: Figures; Tables;
  • Pagination: pp 62-70
  • Monograph Title: Forecasting passenger and freight travel
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00176462
  • Record Type: Publication
  • ISBN: 0309026644
  • Files: TRIS, TRB
  • Created Date: Jun 14 1978 12:00AM