In this research, transportation mode and load route selection problems are integrated with the hub location problem in a single mathematical formulation to find the optimal design of intermodal transportation networks. Economies of scale are modeled utilizing a stepwise function that relates the per container transportation cost to the amount of flow between two nodes. A heuristic method combining a genetic algorithm and the shortest path algorithm was developed to solve this integrated planning problem. Computational experiments were completed to evaluate the performance of the proposed heuristic for different problem instances. At the end, conclusions are presented and future research directions are discussed.
Progress in Material Handling Research
Ghane-Ezabadi, Mohammad and Vergara, Hector A., "Integrated Intermodal Network Design with Nonlinear Inter-Hub Movement Costs" (2018). 15th IMHRC Proceedings (Savannah, Georgia. USA – 2018). 8.