Review of optimization research on high-speed railway EMU operation
WEI Liheng
ZHAO Peng
QIAO Ke
NIU Jiaxin
Abstract：The operation plan of Electric Multiple Units(EMUs)is a critical component in fulfilling trans-portation tasks for high-speed railways.It plays a crucial role in reducing operational costs and enhancing EMU utilization efficiency,with its rationality directly determining the overall quality of railway opera-tions.Currently,formulation of EMU operation plans in railway practice heavily relies on manual experi-ence,leading to inefficiencies and prolonged planning cycles.Consequently,improving the efficiency and quality of EMU operation planning through mathematical models and algorithms has become a focal point of academic research.This paper provides a comprehensive review of domestic and international studies on EMU operation planning.First,it defines the concept of EMU operation planning and exam-ines the distinctions and interconnections among routing,allocation,and maintenance plans.Second,it systematically reviews the current state of research on EMU routing plans from three perspectives:opera-tional conditions,models and algorithms for routing plan formulation,and EMU rescheduling under emergency scenarios.Additionally,it summarizes the modeling methodologies for EMU allocation plan-ning and analyzes the latest advancements in models and algorithms for high-level maintenance schedul-ing.Finally,the paper identifies existing challenges in the formulation of EMU routing,allocation,and maintenance plans and outlines potential directions for future research.The research results indicate that early studies on EMU operation optimization primarily focused on improving routing and allocation plans to enhance utilization efficiency.With the expansion of railway network and the increase in the number of EMUs,issues related to real-time rescheduling and high-level maintenance planning have gained increas-ing attention.Future research should explore the collaborative optimization of maintenance and routing plans,the coordinated adjustment of train schedules and routing plans during emergencies,and precise prediction methods for high-level maintenance scheduling windows.
Keywords：high-speed railwayEMU routing planEMU allocation planEMU maintenance plan
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：13( 1-13 )