Research Article
Nov 1977
Multipath Assignment Calibration for the Twin Cities
Authors: Jerry L. Edwards and Ferrol O. RobinsonAuthor Affiliations
Publication: Transportation Engineering Journal of ASCE
Volume 103, Issue 6
Abstract
Several probabilistic multipath traffic assignments were made to the 1970 Twin Cities highway network. Several aggregate measures were selected to determine the goodness of fit to recorded ground count volumes, including volume-to-ground ratios by route, facility type, screenlines and cutlines; and percent root-mean-square error and percent standard deviation by volume group and facility type. Results indicate that link impedances composed of a linear combination of time and distance and weighted more heavily in favor of distance, when used together with a value of 0.002 for the diversion parameter Θ, produces an assignment that most closely approximates the recorded volumes, and is generally a better assignment than that produced by the all-or-nothing model using calibrated travel times. The probabilistic model exhibits some sensitivity to changes in the diversion parameter Θ, but model sensitivity to changes in the impedance function seems much stronger.
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Published In
Transportation Engineering Journal of ASCE
Volume 103 • Issue 6 • November 1977
Pages: 791 - 806
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Nov 1977
Published online: Feb 5, 2021
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Authors
Affiliations
Jerry L. Edwards
Asst. Prof., Dept. of Civ. and Mineral Engrg., Univ. of Minnesota, Minneapolis, Minn.
Ferrol O. Robinson
Transportation Planner, Barton-Aschman and Assocs., Inc., Minneapolis, Minn.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.