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Title: Intermodal hub-and-spoke network design: Incorporating multiple stakeholders and multi-type containers
Authors: Meng, Q. 
Wang, X.
Keywords: Genetic algorithm
Hub-and-spoke network design
Intermodal transportation
Multi-type containers
User equilibrium
Issue Date: May-2011
Citation: Meng, Q., Wang, X. (2011-05). Intermodal hub-and-spoke network design: Incorporating multiple stakeholders and multi-type containers. Transportation Research Part B: Methodological 45 (4) : 724-742. ScholarBank@NUS Repository.
Abstract: This paper develops a mathematical program with equilibrium constraints (MPEC) model for the intermodal hub-and-spoke network design (IHSND) problem with multiple stakeholders and multi-type containers. The model incorporates a parametric variational inequality (VI) that formulates the user equilibrium (UE) behavior of intermodal operators in route choice for any given network design decision of the network planner. The model also uses a cost function that is capable of reflecting the transition from scale economies to scale diseconomies in distinct flow regimes for carriers or hub operators, and a disutility function integrating actual transportation charges and congestion impacts for intermodal operators. To solve the MPEC model, a hybrid genetic algorithm (HGA) embedded with a diagonalization method for solving the parametric VI is proposed. Finally, the comparative analysis of the HGA and an exhaustive enumeration algorithm indicates a good performance of the HGA in terms of computational time and solution quality. The HGA is also applied to solve a large-scale problem to show the applicability of the proposed model and algorithm. © 2010 Elsevier Ltd.
Source Title: Transportation Research Part B: Methodological
ISSN: 01912615
DOI: 10.1016/j.trb.2010.11.002
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