A toll-based bi-level programming approach to managing hazardous materials shipments over an intermodal transportation network |
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Institution: | 1. University of Bologna, Department of Electrical, Electronic and Information Engineering, Viale Risorgimento 2, 40138 Bologna, Italy;2. Vrije Universiteit Amsterdam, FEWEB (Faculty of Economics and Business Administration), De Boelelaan, 1105 Amsterdam, Netherlands |
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Abstract: | This research proposes a bi-level bi-objective model to regulate the usage of rail intermodal terminals for hazardous materials (hazmat) shipments, where government imposes tolls to deter carriers from using certain terminals. The complexity of the resulting mathematical program motivates the development of a hybrid speed-constrained multi-objective particle swarm optimization algorithm, which is then integrated with CPLEX, to solve the model. Through a real problem instance based on the intermodal service chain of Norfolk Southern in US, the toll-setting model is examined and further compared with a regular network design approach, in which certain terminals are closed to hazmat containers. The computational results show that the toll-setting policy is more practical and efficient, and the two models can be combined as a two-stage strategy in long-term hazmat transportation regulations. Additional managerial insights are derived for different stakeholders. |
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Keywords: | Bi-level programming Facility location Rail-truck intermodal transportation Hazardous materials Particle swarm algorithm |
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