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This paper presents an integrated shelter location and route allocation approach for the emergent evacuation problem with multiple sources and multiple shelters in city transportation networks. A mixed integer linear programming model is developed to formulate the problem, in which the overall evacuation time is minimized subject to capacity constraints on(More)
Emergency evacuation has increasingly gained wide attention. In order to improve the evacuation efficiency, it is important to optimally allocate policemen to crucial roads in the city transportation systems. In this paper, we propose an evacuation network flow optimization model in which the policemen allocation decisions are integrated. It is assumed that(More)
Emergency evacuation aims to transport people from dangerous places to safe shelters as quickly as possible. Police play an important role in the evacuation process, as they can handle traffic accidents immediately and help people move smoothly on roads. This paper investigates an evacuation routing problem that involves police resource allocation. We(More)
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