Research Article
Jan 1978
Examination of Simplified Travel Demand Model
Publication: Transportation Engineering Journal of ASCE
Volume 104, Issue 1
Abstract
A simplified travel demand model, the Internal Volume Forecasting (IVF) model, proposed by Low in 1972 is evaluated as an alternative to the conventional urban travel demand modeling process. The calibration of the IVF model for a county-level study area in Central Wisconsin results in what appears to be a reasonable model; however, analysis of the structure of the model reveals two primary mis-specifications. Correction of the mis-specifications leads to a simplified gravity model version of the conventional urban travel demand models. Application of the original IVF model to forecast 1960 traffic volumes based on the model calibrated for 1970 produces accurate estimates. Shortcut and ad hoc models may appear to provide reasonable results in both the base and horizon years; however, as shown by the IVF model, such models will not always provide a reliable basis for transportation planning and investment decisions.
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Published In
Transportation Engineering Journal of ASCE
Volume 104 • Issue 1 • January 1978
Pages: 31 - 41
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Jan 1978
Published online: Feb 5, 2021
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Authors
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Robert L. Smith Jr., AM.ASCE
Asst. Prof., Dept. of Civ. Engrg., Univ. of Wisconsin-Madison, Madison, Wisc.
William J. McFarlane
Transportation Engr., Southeast Michigan Council of Governments, Detroit, Mich.
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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.