Design And Improvement Of High Speed Railway Station Feeder Bus Dynamic Line

With the rapid development of high speed railway in China,it not only takes a far more important role in passengers travel and regional economy,but also brings challenges to the public transit and railway stations.It has become a much more practical and valuable problem that how we can provide high quality feeder bus service for high speed railway station passengers.In order to enhance the passenger evacuation ability,while meet the passengers' demand,high speed railway feeder bus rises in the response to the time.The paper researches on the dynamic lines of high speed railway based on the domestic and international results in demand response transport system line design and optimization methods.The contents are as follow:(1)High speed railway dynamic line system is analyzed,while the basic form is described and compared with the conventional bus as well.Depend on the high speed railway feeder dynamic line operation status and passengers' willingness survey and temporal and spatial characteristics analysis,the practicability of high speed railway feeder bus dynamic line is proved.Meanwhile,the analysis of the specific elements creates a condition of model establishment.(2)K-means algorithm is used for the site location,while analyzes its disadvantages,K-means is improved to decide which site is chosen.The first stage model is established with the lowest cost of passenger and enterprise,and the second stage model of feeder bus dynamic line of high speed railway station was established by considering the passenger car ride time,passenger waiting time waiting in the site and the enterprise cost optimal.The kernel load constraint,the first and last terminal,the vehicle driving path,the response real-time demand and the time are chosen as constraints.(3)The microevolution algorithm is chosen to determine the coding scheme,the initial population,the fitness function and the evolutionary strategy.Meanwhile,the original dual operator and mutation operator are introduced,which improve the speed and efficiency of the algorithm as a whole.(4)A case is designed while taking the actual data of Beijing South Railway Station and Fang Zhuang area as examples.MATLAB is used as calculation tool,combining with the improved K-means algorithm and microevolution algorithm to design the route.The results are analyzed and compared to prove the feasibility and efficient of mathematical model and algorithm.