Coordination Optimization Of The First And Last Trains' Transfer Connection On Urban Rail Transit Network

Urban rail transit as an important part of urban transportation system,it is becoming more and more important.Different periods of the day rail transit passenger flow will show different rules,Especially during the first and last train period,according to the passenger flow rules within the time period to coordinate the train connection of each direction of the line network,it can ensure a better transfer experience for passengers.Urban rail transit into the network has brought convenience for citizens travel,however,the complexity of the network also makes it difficult to study the connection during the last train and first train period.This paper aims to study the passenger flow characteristics of the first and last train periods in urban rail transit,to optimized transfer connection,for reduce passenger transfer waiting time and network operating costs.The details are as follows:(1)Analyzed the characteristics of passenger flow at transfer stations during the first and last train periods.It is found that it has periodicity,disequilibrium of transfer direction and disequilibrium of time period,and passenger flow of the first and last train periods has the characteristics of strong purpose and sensitivity to the arrival time of the train.Compared with other periods of passenger flow characteristics and operation coordination organization,analyzed the possible transfer scenarios of passengers during the first and last train periods.(2)Construct a network topology,search all OD valid paths,establish Logit model of time utility to realize passenger flow allocation,thus,the transfer flow of all transfer directions in the network can be calculated.Put forward the importance of the line and the importance of area where transfer station is located.(3)Put forward the concept of time period model,and the importance coefficient of transfer station area.Constructed optimization time period model of the first and last bus schedule.The objective function is to minimize passenger transfer waiting time and line departure cost,the first train departure time,section running time,train stop time,and headway as decision variables,establish mixed integer programming model.(4)Based on the principle of genetic algorithm,designed the algorithm to solving model.Optimize the schedule of shenzhen rail transit first and last train periods,so as to reduce the waiting time of passenger transfer and reduce the operation cost of urban rail transit.