Research On The Mechanism Of The Mode Of Transportation To The Pattern Of Suburbanization

The agglomeration and dispersion is the succession of two stages in the urbanization process. As a performance that population, industry, services and office move from the major city centres to the suburbs, suburbanization is an inevitable process of urban growth. If there is no this kind of centrifugal proliferation, the modern major cities can't exist. Once we have concern about urban practical issues, we can't evade suburbanization.In terms of close relationship between urban land-use and transport development, the dissertation studies the mechanism of the mode of transportation to the pattern of suburbanization. The accessibility affecting by the mode of transportation changes the intensity of land development, and strengthen the form of urban space, the form of urban space is the results of interaction between the mode of transportation and the pattern of land-use. By reason of the transport cost reduced by traffic progresses, micro-individuals' (manufacturers, residents) process of re-location has affect the dispersion of the urban spatial structure, and transport cost plays a role of dispersion factor. Under the influence of both the role of determining as well as strengthening to the form of urban space by mode of transportation and the effects of urban transport corridor, major mode of transportation determines different pattern of suburbanization.Because of the different major mode of transportation, nowadays, there are two typical patterns of suburbanization in developed countries: suburban sprawl and suburban new towns. The dissertation considers that the auto-oriented suburbanization represented by the United States is not a model of sustainable development. And the planning practice of rail transit-oriented building of suburban new towns represented by France, Japan and others is a new idea of urban expansion.On the basis of comparison, the dissertation agrees it is the rational choice of suburbanization of major cities in China to build public transport-oriented suburban new towns and construct multi-centre groups of urban spatial structure.The phenomenon of suburbanization is a result traffic factor affects urban space continuously. The study based on traffic factor for suburbanization breakspeople's thinking about "central cities------suburbs" dual structure of urban space, itmakes people develop city on the basis of region. This is the correct understanding about system of urban spatial structure.