Research On Urban Rail Transit Passenger Flow Assignment Model And Algorithm

Give priority to the development of city public traffic, is an important strategy topromote the healthy development of our city, and the development of city rail transit, is animportant part of city public transport strategy. With the development of city rail traffic in ourcountry and the rapid development of rail transit network scale unceasing expansion, not onlygreatly improved people’s travel environment, but also increase the access and transfer of newsites will also change with the rail traffic network and presents new characteristics, passengerroute choice behavior also has more than single-track operation distinct diversity andcomplexity. To establish a scientific, reasonable and has a strong flow assignment modeloperation, so as to reflect the real passengers in multiple routing assignment situationbackground, to improve the balanced operation and new science, city rail transit networkplanning of the impact on the existing line passenger flow distribution has important practicaland theoretical significance hand.Around the city rail transit passenger flow assignment problem, this paper mainlydiscussed the following aspects of work:1, through the analysis in travel behavior and travel time characteristics of Tianjin railpassengers, and get the general rule of passenger route choice, and then summarized factorsinfluencing passenger route choice in multiple path travel under the premise, as a data basemodel laid. On this basis, the formation of the rail transit network, respectively on theestablishment of graph theory, the path to the passenger flow assignment model of searchmethod are briefly discussed;2, considering the influence factors of passenger flow distribution, establish thegeneralized cost function of residents travel, including the travel time, transfer time, comfortfactors. In order to make the passenger flow assignment problem is more intuitive, constructthe passenger flow distribution route choice Logit model, using C#language programming,and calculation, to determine the route choice probability;3, the paper taking Beijing Metro as an example, according to the peak time of flat peaktime, on a long distance, distance and short distance travel path OD to calculate thegeneralized cost, analysis of the impact of the generalized cost of passenger flow distribution.Finally, the threshold value, value sensitivity analysis.