TITLE

The Shortest Path Problem with Time Windows and Linear Waiting Costs

AUTHOR(S)
Desaulniers, Guy; Villeneuve, Daniel
PUB. DATE
August 2000
SOURCE
Transportation Science;Aug2000, Vol. 34 Issue 3, p312
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This paper considers the shortest path problem with waiting costs (SPWC) as an extension to the shortest path problem with time windows. The problem consists of finding the minimum cost path in a network, where cost and time are two independent quantities associated with a path. Path feasibility is constrained by time windows at each node and a linear cost penalty is imposed for each unit of time spent waiting along the path. Starting from a known, nonlinear, integer programming formulation, we propose two alternative formulations for which algorithms already exist. First, we indicate how to transform the SPWC into a shortest path problem with time windows and linear node costs. Second, we prove that the SPWC can also be formulated as a two-resource generalized shortest path problem with resource constraints. Computational results used to compare these alternative formulations are presented.
ACCESSION #
4292857

 

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