In recent times there has been growing interest in the development and application of methods and models for detailed traffic analyses in small urban sub-areas. Many problems of environmental and traffic management in urban areas require statements about the possible impacts on traffic demands and travel movements of proposed control schemes or development plans. Hence, a need has arisen for traffic models which are responsive to small or incremental changes in network conditions. This paper describes the philosophy, development and structure of one particular model designed for use as a simulator of traffic movements across a test area over a finite period of time (such as a peak hour). The model is a dynamic capacity- restraint assignment procedure which can approximate changes in travel demands, congestion levels and network conditions over short time periods. It includes a probabilistic path choice mechanism which allows trips to be spread over a large number of competing paths, on the basis of the assumed imperfect knowledge of network conditions by travellers entering the network. An application of the model with observed data suggested that the model is a potentially useful tool for sub-area analyses. The model has a degree of flexibility in operation which may allow its use at varying levels of refinement depending upon the detail of the inputs supplied and the outputs required (A). (TRRL)

  • Availability:
  • Corporate Authors:

    Commonwealth Scienfific & Industrial Res Org

    Division of Building Research, P.O. Box 56
    Highett, Victoria,   Australia 
  • Authors:
  • Publication Date: 1980

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 24 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00342266
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0 643 02563 4
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS, ATRI
  • Created Date: Dec 22 1981 12:00AM