Study On Optimization Of Conventional Public Transport Network Under The Influence Of Rail Transit Line

With the gradual increase in the population of urban residents in China,the major cities in the country are facing more and more serious traffic problems.In order to alleviate the urban traffic congestion to promote public transport,domestic cities began to fight for the construction of urban rail transit,China's subway line length increased year by year.And the completion of urban rail transit routes make the city public transport mode of travel has undergone tremendous changes.First of all,the conventional bus in the city is no longer the main body of the urban public system,instead of being replaced by rail transit,and there will be a lot of cooperation and competition.At that time,it is necessary to optimize the adjustment of the conventional bus lines,the formation of rail transit as the main body,conventional bus to supplement the city public transport system.This paper mainly studies the optimization of public transport network from the following aspects.First of all,by analyzing the characteristics and functions of both the rail transit and the conventional bus,the cooperation and the competitive relationship between the two modes of public transport are studied.On this basis,the rail transit line is used as the constraint of the conventional bus line Conditions,to determine the goal of multi-mode bus network optimization to passengers in the city bus system to achieve the minimum travel time and the least cost of public transport units and the establishment of the bus optimization of the target mathematical model and constraints.Taking into account the site transport capacity and the introduction of complex network-related theory to optimize the overall city's site layout and select the candidate route based on the site,in the selection of candidate routes to consider the various types of constraints generated by bus lines and according to rail transit conventional bus candidates are divided into Three categories.Different candidate routes constitute different urban public transport scheme.The genetic algorithm can be applied to the research of this paper,and the target model is solved and the optimal bus network scheme is obtained.Finally,through the analysis of the fifth chapter,the feasibility of the research method is proved,and the specific bus network can be obtained according to the genetic algorithm based on the passenger travel time.