The interrelationships among highway supply, vehicular travel demand, and vehicular fuel consumption are systematically considered using empirical data from Denver and San Francisco. A determination is made of the degree to which fule savings produced by more-efficient vehicle operation on city streets and freeways are offset by the additional fuel consumed by either longer or new vehicular traffic developing in the process an analytical framework, step-by-step procedure, and a base of empirical data that can be easily applied in other urban areas. The principal finding is that where comprehensive application of state-of-the-art techniques for improved traffic conrol of signalized urban arterials and freeways can be used to improve areawide travel time on the order of 10%, the energy savings attributable to this improved quality of flow are substantially less than offset by short-range induced increases in travel. Net energy savings produced are approximately 3% for the two cases analyzed. Further, these estimated savings are of the same order of magnitude as the savings obtainable through the application of measures directed primarily at reducing the demand for vehicular travel. This finding is counter to some recent thinking in which any improvement in highway supply is deemed undesirable from an energy conservation viewpoint since the change is seen as only inducing more travel.

  • Corporate Authors:

    Cambridge Systematics, Incorporated

    100 Cambridge Park Drive, Suite 400
    Cambridge, MA  United States  02140

    Department of Energy

    1000 Independence Avenue, SW
    Washington, DC  United States  20585
  • Publication Date: 1979-10

Media Info

  • Pagination: 72 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00317730
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Contract Numbers: EM-76-C-01-8628
  • Files: TRIS
  • Created Date: Jul 22 1980 12:00AM