The Influence of Transportation on the Urban Spatial Expansion in Beijing
研究了不同道路运输方式对北京城市空间结构变化的影响，发现环线、高速、地铁和铁路主要影响中心城区，而国道和省道主要影响郊区。
Transportation is the major intrinsic and adaptive factor in urban spatial expansion,and it directs the expansion direction. This article chose three representative regions,and the authors found that different road transportations have different influences on the change of urban spatial structure. The central city is mainly influenced by rings,highways,subways and railways,and the suburban area is mainly impacted by the national road and provincial road.