| With the construction of modernization,the urban population has gradually increased,and the city scale has also expanded.The phenomenon of “separation of work and residence” has become more and more common.This not only increases people’s commuting time,but also the crowded commuting environment reduce the travel comfort.Although large-volume and rapid public transportation such as rail transit and mainline buses are deployed in the main passenger flow corridors,they meet the basic needs of some citizens for daily commuting travel.However,due to the high cost of construction and operation of rail transit,the density of the network is extremely low;at the same time,due to the restrictions of road width and grade,there are some areas outside the city that cannot be reached by conventional buses,which have become the service blind spots of urban public transportation system.This article is making the research on the microcirculation bus connecting to rail transit stations.Compared with conventional buses,small or medium-sized buses can shuttle in the community,collect and disperse passengers and realize "point-to-point" service.It plays an auxiliary and supplementary role in the public transportation system,greatly improving regional accessibility and expanding the range of the urban public transportation system.First of all,this paper studies the related theories of microcirculation buses based on rail transit station.Five connection modes based on rail transit station are analyzed.This paper discusses the background of traffic microcirculation,the concept of microcirculation public transportation,its function,and the comparison with other modes of transportation.It also studies the microcirculation bus line mode and its connection mode with rail transit stations.Secondly,it analyzes how to select the area of the microcirculation bus network and the optimization of the bus station.On the basis of clarifying the overall flow of the microcirculation bus feerder network based on rail transit stations,the AHP-TOPSIS evaluation model with regional bus accessibility as the target element was established,and the Arc GIS software was used to calculate the results of each evaluation index.Substituting it into the evaluation model,the evaluation value of the regional bus accessibility of each community is finally obtained.Based on this,the deployment area of the microcirculation bus network is determined.After that,the principles of the station’s layout were clarified,and the distance between stations was optimized with the goal of minimizing the travel time of passengers.The results show that at different vehicle speeds,the distance between stations is an increasing function of the distance traveled by passengers;when the distance traveled by passengers is the same,the higher the speed of the microcirculation bus,the smaller the average distance between stations.Thirdly,with the goal of maximizing the number of passengers served by the microcirculation bus and minimizing the operating cost of the bus company,the route planning model of the microcirculation bus was established with the constraints of a certain vehicle capacity,line length,and maximum operating time.The NSGA-Ⅱ algorithm is used to solve the model.Finally,based on the Liucun Rail Transit Station in Yuhuatai District,Nanjing,a microcirculation bus network was set up in the selected study area.Based on the actual survey data,the results of the route are solved,which verifies the effectiveness of the model and algorithm. |
