Optimization of Convergence based on the Coordination of Train Departure Time in the Subway Transfer Station

By coordinating the trains' departure time in the transfer station,optimized scheme is proposed to reduce the waiting time of transfer passengers in the transfer station of the urban traffic network.The transfer relationship between two trains in different lines which intersect with different forms in a transfer station is analyzed,and the formulas are derived to describe these connecting relationships.Based on the analysis,a model which minimizes the total waiting time of all transfer passengers during the coordinating period is established.Simple genetic algorithm(SGA) with the discard method is designed to solve this problem.Finally,an example with two lines' intersection is given to verify the model and partial optimized solutions are obtained by using the proposed algorithm.The results show that the model can reduce transfer passengers' waiting time.This study can provide some theoretical reference for the design and optimization of the train operation scheme under the urban traffic network operating scenario.