The Algorithm of the Time-Dependent Shortest Path Problem with Time Windows

Abstract

In this paper, we present a new algorithm of the time-dependent shortest path problem with time windows. Give a directed graph , where V is a set of nodes, E is a set of edges with a non-negative transit-time function . For each node , a time window within which the node may be visited and , is non-negative of the service and leaving time of the node. A source node s , a destination node d and a departure time t 0 , the time-dependent shortest path problem with time windows asks to find an s, d-path that leaves a source node s at a departure time t 0 ; and minimizes the total arrival time at a destination node d . This formulation generalizes the classical shortest path problem in which c e are constants. Our algorithm of the time windows gave the generalization of the ALT algorithm and A * algorithm for the classical problem according to Goldberg and Harrelson [1], Dreyfus [2] and Hart et al. [3].