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Integrated multi-track station layout design and train scheduling models on railway corridors

机译：铁路走廊上的综合多轨车站布局设计和列车调度模型

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The dwelling capacity of the station (mainly determined by its multi-track layout) is a practically significant factor to influence the quality of the train schedules, especially in a busy railway corridor with heterogeneous trains and complex operations. To improve the passing capacity and transportation efficiency, this paper focuses on a network design problem over a railway corridor, in which some critical stations are considered to enlarge the number of siding tracks or platforms within the budget constraints. To evaluate the quality of design strategies, the construction cost and total travel time in the corresponding optimal train schedule are adopted as evaluation indexes. Based on two specific modeling methodologies, two types of optimization models are particularly formulated with different considerations. One is a single-level linear mixed-integer programming (S-LMIP) model based on the space-time network representation method; the other is a bi-level programming model associated with the platform choice-based method, where the upper level of the proposed model aims to design new siding tracks/platforms in the candidate stations, and the lower level is a train scheduling model with assigning the tracks for each train at each station. The commercial software GAMS with CPLEX solver and local searching based heuristic with integrated CPLEX solver are respectively employed to solve the near-optimal solutions for these two types of models. Finally, two sets of examples, in which a sample railway corridor and the Wuhan-Guangzhou high-speed railway corridor are adopted as the experimental environments, are implemented to illustrate the performance and effectiveness of the proposed approaches. (C) 2016 Elsevier Ltd. All rights reserved.
机译：车站的容纳能力（主要由其多轨布局决定）实际上是影响火车时刻表质量的重要因素，尤其是在火车种类繁多且操作复杂的繁忙铁路走廊中。为了提高通过能力和运输效率，本文重点研究铁路走廊上的网络设计问题，其中一些关键车站被认为在预算限制内扩大了侧轨或平台的数量。为了评估设计策略的质量，采用相应最优火车时刻表中的建设成本和总行驶时间作为评估指标。基于两种特定的建模方法，特别设计了两种类型的优化模型，它们具有不同的考虑因素。一种是基于时空网络表示方法的单级线性混合整数规划（S-LMIP）模型；另一个是与基于平台选择的方法相关的双层编程模型，其中建议模型的上层旨在在候选站点中设计新的侧线轨道/平台，而下层是具有分配功能的列车调度模型每个车站的每列火车的轨道。分别使用带有CPLEX求解器的商业软件GAMS和集成CPLEX求解器的基于本地搜索的启发式方法来求解这两种模型的近似最优解。最后，以两个示例为例，以一个样例铁路走廊和武广高铁走廊为实验环境，来说明所提出的方法的性能和有效性。 （C）2016 Elsevier Ltd.保留所有权利。

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