Study On Passenger Flow Assignment Of Urban Rail Transit Network

In recent years,urban rail transit develops in a fast speed in order to solve the severe traffic congestion.The urbanization process makes the urban residents in urgent need of the transportation network,in order to meet the travel requirements of passengers,many cities in the rail transit gradually expanded from single-line operation to multi-line operation.Although the traffic network is becoming better and better perfect,the choice of travel route is diversified from diversification to the diversification of the route,and the complexity of this choice has been bring new challenges to the operation and management of rail transit.Therefore,theoretic research on path selection probability,as well as the passenger flow assignment and the volume and direction of transfer passengers does great help to capture the law of flow assignment and improve the level of operation management.This paper mainly focuses on the passenger flow assignment problem of urban rail transit network.The paper takes the main influencing factors of passenger flow assignment in urban rail transit network its own unique attributes of rail transit network into consideration,and establishes a generalized cost function which is based on the time of travel,the number of times of transfer and the convenience.And the concept of effective path is defined according to the existing literature,then a search algorithm based on the traversal algorithm based on graph is proposed to simplify the route selection based on transfer station.As the passenger flow assignment of urban rail transit network is the result of all passenger route selection and gathering,the paper puts forward the classification of passengers on the basis of passenger types,and classifies and summarizes the factors such as age,job occupation,income and purpose,and aims at different types of passenger to carry out passenger flow assignment.This paper takes the Chengdu subway for intance,the example of path selection probability is calculated on the basis of the data of Chengdu Metro 1,2,3,4,7 and 10,and the calculation of different passenger types are carried out.The results show that the increase of the number of transfer has a greater impact on the probability of path selection,passengers choose path differs from the probability of different types.