Variability of Travel Time, Congestion, and the Cost of Travel

Nicolas Coulombel and André de Palma ()

Mathematical Population Studies, 2014, vol. 21, issue 4, 220-242

Abstract: The variability of travel time modifies the rush hour traffic and the cost of commuting. The bottleneck model of road congestion with fixed peak-load demand is augmented of an additive random delay. When individuals have ( α-β-Gamma ) preferences, there exists a unique Nash equilibrium. The variability of travel time leads to departure rates that are spread more evenly over the rush hour than when travel times are deterministic. This equilibrium mechanism mitigates both congestion and the cost of unreliability. This implies that "single-traveler models," which treat congestion as an exogenous phenomenon, overestimate the value of reliability for the rush hour. The application with the uniform or with the exponential distribution helps appraise the overestimation.

Date: 2014
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Working Paper: Variability of Travel Time, Congestion, and the Cost of Travel (2014)
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DOI: 10.1080/08898480.2013.836420

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