Research On Optimization Method Of Community Bus Route Based On Improved PSO Algorithm

In recent years,many large and medium-sized cities at home and abroad have begun to build a boom in rail transportation and mainline transportation networks,providing convenience for residents’ long-distance commuting.However,today’s urban public transport system planning has an uneven phenomenon.The development of feeder buses is limited.In new communities and old areas on the outskirts of the city,limited by road conditions and topographical factors,conventional public transport methods cannot provide comprehensive services.,Residents have difficulty traveling in the "last mile".The community bus can effectively cover the branch line network,fill the blind traffic area,and improve the efficiency of rail transit.Therefore,this article takes the connection coordination problem between urban rail transit and conventional bus as the research entry point,and discusses the method of community bus line layout,which is conducive to improving the service level of the public transport system and promoting the transformation of urban residents to public transport.The main research contents are as follows.(1)The related concepts of community bus are explained,and the community bus is compared with the conventional public transportation.At the same time,it summarizes the passenger flow characteristics of community buses connecting urban rail transit,that is,the purpose of travel,the distribution of travel time and the distribution of travel space,and obtains the characteristics of the route planning of community buses.(2)The process and method of setting up the community bus lines connecting urban rail transit are determined.Based on Analytic Hierarchy Process(AHP)and Entropy Method,according to vector map data and statistical survey results,Arc GIS and SPSS software were used for index calculation,and the evaluation results of traffic convenience in central urban area were obtained.At the same time,the data visualization analysis was carried out for the areas with relatively poor convenience,the spatial-temporal aggregation effect of the crowd was studied,and the selection principles and requirements of the community bus stations were determined.(4)Summarize the design goals and optimization principles of community bus lines based on rail transit stations,build a multi-objective optimization model that meets the characteristics of community bus line passenger flow distribution,and use the improved particle swarm optimization algorithm with the minimum total cost and the highest passenger direct rate as the optimization goals Perform model solving.(4)Taking dalian metro line 5 as the research object,combined with the operation status of the bus system,some rail transit stations were selected for community bus line layout byusing the model constructed above.This paper evaluates the bus convenience of the newly installed area and summarizes the relevant operation and organization countermeasures.