A Biobjective Hub Location Model with Consideration of Congestion for Railway Transportation Planning

Abstract

Transportation planning is highly essential and important, especially for railway systems. In this paper, we propose an optimization model to determine optimal station locations in a rail network. The objective is to minimize the total transportation cost, which is composed of operation costs and fixed costs. Congestion of the system is considered as the second objective, which is to minimize the longest travel time that a passenger spends on the trip. The problem is formulated as a multi-objective programming model and solved by the -constraint method. A case study of railway transportation is presented. By using the proposed optimization model, we are able to obtain all non-dominated solution points, which provides alternatives for decisionmakers. The results are beneficial and support decisionmaking in railway transportation planning.