Research On Optimization Of Inter-city Bus Transport Network Under The Influence Of Inter-city Rail Transit In Urban Aggolemeration

With the rapid development of China’s economy,the process of urbanization continues to accelerate,urban agglomeration came into being.With the increasing commercial trade and cultural exchanges between cities,the number of contacts has gradually increased.In order to comply with the rapid development of urban agglomerations,inter-city rail transit has been built by various urban agglomerations.Due to the opening of the inter-city rail transit route,the mode of public transportation in the urban agglomeration has been greatly changed.First of all,the inter-city bus transport is no longer the main body of the urban mass transit system,but is replaced by inter-city rail transit.At the same time,a great deal of cooperation and competition in the two public transport modes will be created.Therefore,this thesis optimizes the adjustment of the intercity bus routes.the inter-city public transportation system of inter-city rail transit as the main body and inter-city bus transport as the supplement should be produced.Firstly,with the analysis of inter-city public transport characteristics,the characteristics and functions of inter-city supplement and rail transit are analyzed and positioned.Under the competitive and cooperative relationship,the positional relationship and the combination of the two modes of transportation are analyzed.Further,the adjustment method of the inter-city bus transport network within the scope of inter-city rail transit attraction is studied.Secondly,as the inter-city bus transport network planning includes urban areas,rural-urban continuum,many townships and villages,at the same time,different functions of the inter-city rail transit site have different impacts on the selection of inter-city bus transport.In this thesis,the importance evaluation model of regional nodes in urban agglomerations is constructed.The key nodes that the inter-city bus transport lines should pass are identified.The residents’ OD data,site transportation capacity,and station spacing are taken into account comprehensively simultaneously,the overall layout of the inter-city bus transport stations is optimized.Then,the initial inter-city bus transport route is generated based on the site layout.According to the corridor width of the inter-city rail transit,the inter-city bus transport lines that need to be adjusted are determined.To optimize inter-city public transport in urban agglomerations,the multi-objective mathematical model and constraint conditions for maximizing the number of residents served by inter-city bus services,maximizing the number of residents by inter-city rail transit services and minimising time costs of inter-city travel are constructed.In order to solve the target model,various factors in the genetic algorithm are designed.The optimal inter-city bus transport network layout plan is obtained.Finally,set Changsha-Zhuzhou-Xiangtan urban agglomeration as an example,according to the idea and method of this thesis,the layout of inter-city bus transport routes is given.The rationality and practicability of the proposed model and method are verified.