The mathematical form of travel time factors. Paper presented at the 48th Annual Meeting of Highway Research Board HRB, Washington, D.C., January 1969.

Author(s)
Ashford, N. & D.O. Covault.
Year
Abstract

The travel time factor represents the effect of travel time on trip interchanges. In its use in gravity model studies, the travel time factor is an empirical hand-down curve that is considered constant over time. This paper questions constancy over time by attempting to express travel time curves in parametric form and relating the parameters of variables within the study area that know to change over time.

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Publication

Library number
A 4473 (In: A 4469 S) IRRD 49097
Source

In: Travel factors and travel models, Highway Research Record HRR No. 283, 1969, Pp.

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This publication is one of our other publications, and part of our extensive collection of road safety literature, that also includes the SWOV publications.