| In recent years, the function of urban road is more and more clear, and corresponding tothis, bus lines should be corresponding to the function division. A public transit networkstructure with clear hierarchy and function contributes to the overall effectiveness andefficiency of public transport systems. But most of the urban public transport system in ourcountry at present has not formed a network structure which has primary and secondary points,and can be balanced allocation of transport capacity. Therefore, based on the current research,the theory system of conventional bus multi-level network structure is formed in this paper,which is analyzed and researched from all levels, including its basic theory, evaluation index,optimization model and method of layout.In this paper, the basic theory is tidied firstly, which is related to the network structure ofconventional public transit, including the main factors influencing the bus network structure,the common type of bus network structure, network hierarchy of public transport andtopology analysis etc; Then from three aspects of bus network, bus lines and bus station, theevaluation index system of bus network structure is constructed; According to the differentfunction and level of lines, the hierarchical transit network optimization model is established,and hierarchical planning method for the layout of line network is proposed; Finally,according to the above results, the hierarchical bus network optimization methods is studied,which are based on the improved ant colony algorithm, and through a theoretical calculationexample to validate the practicability of the method, the results show that the method isfeasible and practical, and can be used to guide the hierarchical bus network architecture forthe cities with different land use layout, and lay the foundation for further study on theplanning and design of multi-hierarchy public transit, and also provides the basis for the linelayout. |
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