Journal
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
Volume 144, Issue 2, Pages 379-396Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0377-2217(02)00147-9
Keywords
transportation; vehicle routing; time-dependent; tabu search
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Most of the models for vehicle routing reported in the literature assume constant travel times. Clearly, ignoring the fact that the travel time between two locations does not depend only on the distance traveled, but on many other factors including the time of the day, impact the application of these models to real-world problems. In this paper, we present a model based on time-dependent travel speeds which satisfies the first-in-first-out property. An experimental evaluation of the proposed model is performed in a static and a dynamic setting, using a parallel tabu search heuristic. It is shown that the time-dependent model provides substantial improvements over a model based on fixed travel times. (C) 2002 Elsevier Science B.V. All rights reserved.
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