Research On Passenger Flow Assignment Of Urban Rail Transit

With the continuous progress of the construction of urban rail transit, the line network has been expanding, and the structure has been constantly improving. The urban rail transit network operated in all the network has become an inevitable trend. The path which the passenger can select will be more and more under the network operation mode of the "seamless transfer". Since passengers have different understandings about the travel path’s composite impedance, the path selection is much more diverse, and more difficult to be mastered. Then it is a vital part to grasp the passenger’s route to determine passengers’routes. So we’ll analysis the factors affecting the route choice in depth. We can obtain the more accurate line network passenger distribution, if only the passenger routes be identified. Then it can provide the basis for the passenger flow forecast, operating organization and ticket clearing between different operators.This paper studies the various factors that impact on the passengers’ route choices. Then a more realistic comprehensive impedance function is established, which lays the foundation for the selection of the efficient paths and the passenger flow assignment. The main contents of this paper can be summarized as follows:(1)This paper analyzes the impact of different transfer modes on transfer time which provides a reference for the conmulation of the transfer time which affect the determination of the efficient paths and the passenger flow assignment.(2)According to the characteristics of the urban rail transit network, the efficient path is defined. And learn the search algorithms for the efficient path to find the breadth-first search algorithm which fits the urban rail transit network well.(3)Analyzing the factors that impact on passenger travel route choice, and establish a more realistic comprehensive impedance function on the basis of taking full account of the crowding effect, transfer times and transfer crowded delay time.(4)The paper calculates the passenger flow assignment proportion of the long, medium and short distance OD in the peak hours of peace-peak hours respectively. And On this basis, it analyses the effects of the crowding effect and the transfer crowded delay time on the passenger flow assignment. The results show that the crowding effect of traveling and the transfer delay time because of crowding has a great impact on passenger flow distribution, especially for long distance travel. What’s more, it analyses the sensitivity of the efficient path threshold, passengers’ familiarity with the network, transfer sensitivity and the transfer times sensitivity which can provide a reference for the selection of parameters in the practical application.