Transferring System Of The Urban Rail And Bus System Study

With the commissioning of new rail lines,the topology of the rail network has changed.The connection and transfer system of the subway and bus line network is in the stage of dynamic adjustment,so the subway passenger flow connection has become a vital issue in rail transit management.In terms of Transit-oriented development,bus travel with "space" as the consideration factor and the improvement of the timeliness of transfer and connection of each traffic mode with "time" as the factor cannot wholly improve the current complex and changeable traffic network situation.Combining time and space factors is necessary to consider the compression of transfer time and transfer distance.Optimize the traffic connection facilities on the principle of bus priority,put forward an optimization plan for the connection,improve the convenience of public transportation services,and provide a decision-making basis for the path planning of the bus line network.This paper first sorts out the research status of subway and bus connection and transfer,and proposes the research content and technical routes.Secondly,taking Beijing Metro Line 6 as an example,the spatial and temporal characteristics of the bus line network around the subway station are identified and judged,and the travel characteristics of the passenger flow at the station and the characteristics of the bus line network in the radiation area of the station are analyzed and identified.Third,based on the spatial(connection and transfer distance)and time(connection and transfer time)characteristics of Metro Line 6,the distance attenuation sensitivity and transfer time threshold of the connection and transfer system are calculated,and the connection and transfer system in the case area is accurately recognized.Fourth,the Qingnian Road subway station of Metro Line 6 is selected to determine the potential demand of the connection and transfer bus line network at the station,based on this demand and its spatial and temporal characteristics,the genetic algorithm modeling optimization is used to design the connection and transfer bus line network and perform model calculation.Finally,the marginal utility coefficient comparison is used to analyze the bus line network before and after optimization,and the utility quantification is carried out to identify the changes in the connection and transfer characteristics of the stations before and after optimization.Beijing Metro Line 6 shows that the distance attenuation coefficient is about 4.4,and the overall time threshold of the connection and transfer is about 30 minutes.Using genetic algorithms to optimize the connection and transfer bus line network in the 7 km radiation area of The Youth Metro Station,it is concluded that the total cost is the lowest when the transport volume is designed as 3 vehicles,the number of bus line networks is increased from 5 to 8,the number of bus stations is increased by 27,and the length of the bus line network is from 56.84 km before optimization to 78.7 km after optimization.Using the marginal effect model,the marginal effect of the spatial characteristics of the bus line network of Metro Line 6 on the passenger flow of the subway is calculated,and the length of the line network is positively correlated and the coverage rate of bus stations is negatively correlated.The results show that improving the connection and transfer system can increase the length of the line network and the number of stations within the maximum transfer time,and optimize and improve the system synchronously to achieve the expected marginal benefits.