A heuristic for the location of a rapid transit line

Abstract This article presents a mathematical model and a two-phase heuristic for the location of a rapid transit alignment in an urban setting. This method can be viewed as a building block for the multi-line network design problem. Computational results on randomly generated instances and on some Milan real data confirm the efficiency of the proposed approach. Scope and purpose When designing rapid transit lines, a common objective is the maximization of the toal population covered by the alignment, subject to interstation spacing constraints. This article describes an efficient and robust heuristic for generating good alignments. These can then be assessed according to other criteria before a final decision is made.

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