Multiperiod line planning coordinately of urban rail transit by considering inter-period rolling stock connections

Document Type

Journal Article

Publication Date

2025

Subject Area

place - asia, place - urban, mode - subway/metro, infrastructure - rolling stock, economics - operating costs, operations - coordination, operations - capacity, planning - methods

Keywords

Urban, rail transit, rolling stock, line planning

Abstract

Traditional rail transit line planning concentrates on a single period (e.g., an hour), which ignores plan synchronization and potentially results in unavailability of rolling stocks between periods. A multiperiod line planning (MLP) method is proposed to create a coordinated and efficient full-day line plan. To represent plan coordination between periods, a macro and special train connection network is constructed to describe the dynamic transfer process of inter-period rolling stock from one train route to another. A bi-level optimization model based on the connection network is developed. The upper level formulates MLP problem with rolling stock connections as a mixed integer linear model, and constructs a descent direction search by considering the optimality conditions of the lower-level problem. The lower level is a passenger flow assignment problem, solved using a label-setting algorithm. Finally, an empirical investigation of Beijing subway line 1 is conducted to validate the effectiveness of the proposed method. Results show that the multiperiod coordination plan effectively saves operation cost by 13.6% and passenger travel time by 3.45%, compared to the actual line plan. Besides, the impacts of rolling stock connections on multiperiod line plans become significant when system capacity is tight.

Rights

Permission to publish the abstract has been given by Elsevier, copyright remains with them.

Comments

Transportation Research Part E Home Page:

http://www.sciencedirect.com/science/journal/13665545

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