Macroscopic traffic-flow models play an important role in the planning, design, and operation of transportation facilities. Evaluation of these models is often required to select the appropriate model that best represents prevailing operating conditions. For this purpose, a technique is needed that will enable the analyst to easily and quickly estimate model parameters. The technique should be easy to understand and use and inexpensive to apply and should generate results that reasonably represent actual traffic behavior. The development of such a technique is described. The proposed estimation procedure is based principally on the theoretical relations between model parameters and traffic-flow criteria. Such relations were developed for both single- and two-regime approaches. To facilitate use of the procedure, generalized nomographs were developed to model the complexity of the theoretical aspects involved. These nomographs are capable of directly providing the values of model parameters that satisfy specified evaluation criteria. This procedure significantly reduces the need for regression analysis in estimating model parameters and thus appears to be of particular use in a wide range of transportation applications. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 24-37
  • Monograph Title: Traffic flow theory, characteristics and capacity
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00334159
  • Record Type: Publication
  • ISBN: 0309031168
  • Files: TRIS, TRB
  • Created Date: Oct 28 1981 12:00AM