中文摘要：

针对我国当下大城市房价高企、调控艰难的大背景以及和住房发展密切相关的大城市交通拥堵等问题。从重庆市的“组团式”和“低房价”的客观现象入手．通过城市建设的空间结构特征与历史惯性分析．解析重庆市“多中心”特征下的出行“低时耗”现象的成因：以实证方法深入分析城市空间组织与房价空间分布的内在规律。对城市发展的“空间红利”与“低房价”的关联性及其作用机制做出解释。最后，基于重庆研究的发现，延伸讨论我国大城市城市空间拓展与保障住房建设的有关规划策略。

英文摘要：

The study is carried out under a context of mounting problems facing big Chinese cities, including housing affordability, price-control failures, traffic pressures and so on. The study examines Chongqing＇s past trajectories in urban development and attempts to explain the phenomena of the city＇s multi-centric spatial structure, low transportation pressure and high housing affordability Finally, the implications of the Chongqing case are discussed, in particular, the measures to facilitate the optimization of spatial structure and to achieve the social objective of housing affordability for big metropolises in China during the Twelfth Five-Year Plan period.