Munich Personal RePEc Archive

Additive measures of travel time variability

Engelson, Leonid and Fosgerau, Mogens (2011): Additive measures of travel time variability. Published in: Transportation Research Part B , Vol. 45, (2011): pp. 1560-1571.


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This paper derives a measure of travel time variability for travellers equipped with scheduling preferences defined in terms of time-varying utility rates, and who choose departure time optimally. The corresponding value of travel time variability is a constant that depends only on preference parameters. The measure is unique in being additive with respect to independent parts of a trip. It has the variance of travel time as a special case. Extension is provided to the case of travellers who use a scheduled service with fixed headway.

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