A model of urban automobile traffic which does not rely on a link-by-link network description would be useful in analyzing impacts of policies intended to improve various measures of urban traffic efficiency. Here a steady-state macroscopic traffic flow model is extended to accommodate heterogeneous road types. A comparison to an equilibrium traffic assignment on a test network specifies errors due to spatial aggregation in the macroscopic model. Potential errors due to the assumption of steady state are indicated and a time-dependent macroscopic model is developed to study road system response to time-varying demand. /Author/

  • Supplemental Notes:
    • Presented at the TIMS/ORSA Joint National Meeting, San Francisco, California, May 9-11, 1977.
  • Corporate Authors:

    General Motors Corporation

    Research and Development Center, 30500 Mound Road
    Warren, MI  United States  48090
  • Authors:
    • Carnahan, J V
    • Tobin, R L
  • Publication Date: 1977-4-28

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 32 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00178330
  • Record Type: Publication
  • Report/Paper Numbers: GMR-2420
  • Files: TRIS
  • Created Date: Jul 29 1981 12:00AM