Research On Coordination And Optimization Of Traffic Organization In Urban Rail Transit Network

From the perspective of urban rail transit network as a whole to arrange the train operation organization of each route in the system is a necessary condition for the efficient and scientific management under network.Urban rail transit traffic organization mainly includes vehicle selection,marshalling,crossing,stopping,and interval planning.The passenger flow is the basic foundation of formulate operational network.Under the network conditions,in addition to the movement of passengers within each line,there are a large number of passenger transfer between lines as a result,the network traffic organization design in addition to consider each line passenger flow,still need to consider the interaction between the lines.At first,this paper analyzes the passenger flow in each direction at every station section,and all the hours of time and space distribution characteristics.At the same time,it summarizes the each line of urban rail transit train traffic organization plan principle and its applicability.And then,analyses the transfer station transfer passenger transfer mode,transfer process between the passenger line,the statistics of passenger transfer course time,results show that the peak and off-peak passenger transfer go line peace time obey logarithmic normal distribution and normal distribution respectively.By computing platform passengers to change into the line at the same time looking for a good on time,according to the train departure in lines,the transfer passenger waiting time is determinedSecondly,study the transportation capacity of each section of the line network,the waiting time of passengers at each station and the waiting time for passengers due to transfers.In order to improve the transport capacity utilization to reduce waste of capacity,reduce the passenger station and change to the waiting time as the optimization goal.A multi-objective model is established with the optimization of the train interval and the departure time of the first train departure station as the decision-making method and the solution algorithm is designed.Finally,obtain weekday morning rush 8:00-9:00 passenger OD data and operation time,and apply the established model and designed algorithm to the network composed of Xi’an Metro Line 1,2,3,4.the results show that the optimized capacity and total station passenger waiting time have been reduced,passengers transfer to total waiting time reduce above 15%,and verify the validity of the model of network traffic organization and coordination optimization...