Optimization of express/slow train operations in integrated suburban and urban rail systems based on passenger demand
REN Ai
MENG Lingyun
WANG Yihui
HUANG Wenzheng
REN Ran
Abstract：To align with the current trend of integrating suburban railways and urban rail transit lines,this study proposes a mathematical model to optimize the train operation plan based on passenger flow distribution. Specifically,suburban railways operate express/slow trains,while urban rail transit lines run all-stop trains,with a connection at terminal station. The model is formulated as a bi-objective nonlinear integer programming problem,aiming to minimize passenger travel costs and enterprise operational costs,under constraints such as passenger demand and line capacity. A genetic algorithm is designed to find near-optimal solutions. The model's effectiveness is validated using data from Chongqing Metro Line 5 and the Jiangtiao Line,comparing different operation modes-interchange,in-tegrated operation,and express/slow trains-based on travel time for mainline and cross-line passengers,and train stopping and operational costs. The findings indicate that integrated operation with express/slow trains reduces passenger travel time by 2.92％ and enterprise operational costs by 4.88％,compared to the interchange mode. This approach is particularly suitable for routes with high cross-line travel demand,facilitating rapid transit from suburban areas to city centers. The proposed model offers theoretical support for the efficient integration of suburban railways and urban rail transit,enhancing transportation efficiency and passenger convenience.
Keywords：train operation plansuburban railwayurban rail transitintegrated operationexpress/slow train
Publication Date：2024-08-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 153-163 )