The Relationship Of Urban Traffic Congestion And Urban Spatial Expansion

It is a hot topic and puzzle for urban traffic congestion in china and all over the world at present. Various countries or cities have been troubled by traffic congestion in different degrees. The relationship of urban traffic congestion and urban spatial expansion was studied by using Industrial Economics, Urban Economics, Regional Economics, and Econometrics, etc. The root of the urban traffic congestion is the contradiction between the clustering effect and limited urban space. We couldn't change it only by improving transport system itself, so that we should look for the answer from good growth of city and rational spatial expansion. This dissertation mainly conducted some researches as follows: (1) the relationship of traffic congestion and urbanization process; (2) mechanism analysis of controlling urban traffic congestion; (3) empirical study on Tokyo Japan and Beijing China; (4) Quantitative Analysis by using Japanese data; (5) some ideas put forward to ease traffic congestion by spatial expansion, which combined theoretical exploration and practice. Based on research and analysis, the dissertation considers that simple spatial expansion, such as suburbanization, urban sprawl, would cause traffic congestion by the increase in longdistance commuters. However, traffic congestion mitigation should be achieved by spatial expansion, such as complex polycentric form, as a result of the interaction between agglomeration and dispersion. It is important to solve urban traffic congestion that efficient polycentric layout would establish, which grasps spatial law of industrial conversion, residential and employment functions in the geographical space of coordination and mixed, and the adoption of a coordinated transportation system (such as UMT) to the connection between centers. It is impossible not to crowd in the high-concentration space, agglomeration and congestion as unity of opposites. There is insufficient transport use and a larger waste in case of no congestion. It should be feasible or "best" situation to reduce congestion to an affordable extent and be conducive to orderly sustainable urban development by taking full advantage of a variety of methods. Compact, efficient and orderly urban growth is our Goal.