Research Of Optimization On Bus Transit System Based On Urban Railway

With the effect of rail transit in solving urban traffic problems becoming more and more obvious,more and more cities choose to develop rail transit system with large volume as the main way to solve urban traffic problems,but urban rail transit is not a door-to-door trip mode,it needs another way to seamlessly connect when leaving the subway station.Normal bus transit has the characteristics of small investment and flexible network layout,which is the best choice to solve the problem of "the last kilometer of rail transit".However,the development of urban rail transit in China lags behind that of normal bus transit,it used to begin after the bus transit has developing a certain extant.Therefore,after the new line of urban rail put into use,the normal bus transport needs to actively optimize itself rely on rail transit.This paper mainly studies the optimization methods of the normal bus transport system after the new line of urban rail transit putting into use.On the basis of the analysis and summary of the existing optimization methods of public transport system both here and abord,aiming at giving full play to the transportation efficiency of the rail transit system,the optimization methods of the system are put forward in two aspects: the bus station and the bus line network.Firstly,the competition and synergy between urban rail transit and nermal bus transport are studied.Based on the statistical analysis of the scale of rail transit operations in various cities in China in 2017,this paper divides the development of urban rail transit in China into three stages,and summarizes the functions and status of urban rail transit and conventional public transport in each stage;studying a series of characteristics of urban rail transit and normal bus,and analysing the cooperation and competition relationship between them.On this basis,the layout model of the integration of urban rail transit and conventional public transport and the optimization principles and strategies of the conventional public transport system under the background of rail transit are put forward.Then,the layout optimization of bus stations and bus network optimization methods under the background of urban rail transit are studyed.According to the analysis of the existing methods of bus stations and bus network optimization,this paper studies the impact of new lines of urban rail transit on conventional buses,introduces the concept of Voronoi Diagram,establishes an evaluation model,takes the average arrival time of passengers on foot as the main basis for setting up transfer hubs,and takes the coverage and track of normal bus network as the main basis.Traffic collinearity,service rate of railway network station and average travel time of residents from bus to rail transfer station are the main evaluation indexes to guide the optimization of conventional bus network in the affected area of transfer hub.Finally,a complete optimization method of conventional bus system under the background of urban rail transit is put forward.Finally,the empirical research is carried out in the background of Wuhan Donghu High-tech Development Zone.The optimization method proposed in this paper is verified by examples,which shows the practicality and scientificity of the research results.