The Optimization Research On Bus Routes Of Community Connecting With Rail Stations

Along with the expansion of cities,rail transit extended to the edge of the city area continuously,and contacted with conventional ground bus.Them form of the public transport network,which was closely linked and complementary advantages,this network provided fast and convenient traffic services for the residents of edge of the city.As a form of regular bus transport,with flexible and good accessibility feature,community bus connected with rail transit on the edge of the city area,and formed an integrated public transportation system.Although community bus has been a long time,but in terms of line planning,site connection still existed the insufficiency,the bus route about community bus which connected with rail transit was researched in this article,aimed to improve the service quality of urban public transportation system and the urban traffic problems.Firstly,the characteristics of community bus which connected with rail transit was analyzed in this paper,the definition,function,characteristics,problems in development and reasons of community bus was expounded,focused on the analysis of the characteristics of the community bus,think the passenger flow distribution mainly unimodal type;Eight space layout form;the farther the city periphery,the community bus transceiver bus time earlier,the longer the departure interval time;Change the location of trasnsfer sations should consider the satisfy traffic,service,efficiency and land use space requirements.Secondly,some factors which influence the setting of route of community bus how to work was analyzed in this paper.The results showed that the community planning guide bus lines through the dense space,and the effective connection with other public transportation.The distance of rail transit stations guided the "enhanced" and "weakening" core of urban development patterns,and encouraged the community bus lines to transfer station respectively form a "single center" and "the double center" layout form;The community bus transfer station shall be set up within the scope of the rail site directly attract,the community bus line should be locate in rail site within the scope of indirect attract;the bus lines designing was required by the community residents travel characteristics to meet the demands of residents of commuting and the differences of travel.Based on the analysis of the characteristics of the community bus and the influencing factors of the wiring layout,put forward the setting principle of community bus which connected with rail transit.Then,based on the principles of the community bus lines layout,requirement of passenger and bus enterprise to coordinate contradiction as the goal,a community bus routes optimization model was built in this paper,and used the heuristic algorithm and Depth first Search algorithm(the Depth-first Search,DFS)to solution this model.Finally,the Caijia group in Chongqing was selected as an example in this paper,finded a satisfy practical needs,and conformed to the objective function value was the smallest community bus line scheme,proposed optimization method was systematic,integrity and applicability.Qualitative and quantitative research method were used in this paper,got a set of community bus which connect with rail transit lines layout method,this method was important for the urban public transportation planning theories and methods.