期刊
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
卷 41, 期 6, 页码 523-536出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tra.2006.11.005
关键词
hub-and-spoke problem; rail freight; network design; optimization; logistics; Europe
This paper addresses a hub-and-spoke network problem for railroad freight, where a central planner is to find transport routes, frequency of service, length of trains to be used, and transportation volume. Hub-and-spoke networks, often found in air freight, have not been favoured by railways in the past. Such a structure could be profitable, however, if there exist concentrated freight flows on some service links. We formulate a linear integer programming model whose objective function includes not only the typical operational cost, but also cost due to the transit time spent by freight in the network. We then develop heuristic algorithms to solve large scale instances occurring in rail freight systems in France plus Italy; Germany; and a 10-country European network. By assuming that every node is equipped with consolidation capability, we let the final solution naturally reveal potential hub locations, the impact of several of which is studied by sensitivity analysis. (c) 2006 Elsevier Ltd. All rights reserved.
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