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)
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/10753178
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Supplemental Notes:
- Publication of this paper sponsored by Committee on Transportation Planning Needs and Requirements of Small and Medium-Sized Communities. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Leftwich, David Scot
- Heimbach, Clinton L
- Publication Date: 1983
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 91-98
- Monograph Title: TRANSPORTATION AND LAND USE PLANNING
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Serial:
- Transportation Research Record
- Issue Number: 931
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Accuracy; Link volume; Routing; Small cities; Traffic assignment; Traffic restraint; Traffic simulation; Traffic volume; Trip distribution; Trip generation; Trip purpose
- Old TRIS Terms: Multiple purpose projects
- Subject Areas: Highways; Planning and Forecasting; I72: Traffic and Transport Planning;
Filing Info
- Accession Number: 00387656
- Record Type: Publication
- ISBN: 0309036216
- Files: TRIS, TRB
- Created Date: Sep 28 1984 12:00AM