MULTIPURPOSE TRAFFIC ASSIGNMENT USING VOLUME RESTRAINT AND LINK RESTRAINT FOR APPLICATION IN SMALL URBAN AREAS

The development of a new traffic assignment model consisting of a set of procedures for an urbanized area with a population of 172,000 is described. Historical, social, and economic data were used as input to conventional trip generation and trip distribution models to produce a trip table for network assignment. This fixed table was divided into three trip types: external-external, external-internal, and internal-internal. The methodology used to develop the new traffic assignment model assigned each of the trip types by varying the diversion of trips from the minimum path. External-external trips were assigned on a minimum path routing and external-internal trips were assigned with a slight diversion from the minimum path. Internal-internal trips were assigned with more diversion than external-internal trips and were adjusted by using iterative volume restraint and incremental link restraint. An all-or-nothing traffic assignment model, Dial's multipath model, a volume restraint model, and a link restraint model were joined in five different combinations for a statistical analysis to analyze each procedure used in the new traffic assignment model. The results of the analysis indicated that assigning trips by trip type using trip diversion and volume and link restraint produces a significant improvement in the accuracy of the assigned traffic volumes. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 91-98
  • Monograph Title: TRANSPORTATION AND LAND USE PLANNING
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00387656
  • Record Type: Publication
  • ISBN: 0309036216
  • Files: TRIS, TRB
  • Created Date: Sep 28 1984 12:00AM