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我国城市道路网密度低(主要是支路网密度)是一个普遍存在的现象,我们也经常将交通拥堵的主要原因归咎于此。国内不少学者、规划师均提倡高密度网络,并进行了大量的理论论证和实践研究来支撑这一观点。但是在城市规划、建设的落实中却屡屡碰壁,一些纯粹“从无到有”的城市新区的路网密度指标也难以达到这一要求。其主要原因何在呢?路网密度与街区尺度存在密切相关性。为了定量化描述两者的相关性,对长、宽均为1公里的地块进行4、9、16、25、36、
The low density of urban road networks in our country (mainly the branch road network density) is a ubiquitous phenomenon and we often attribute the main causes of traffic congestion to this. Many domestic scholars and planners advocate high-density network, and carried out a large number of theoretical proofs and practical studies to support this view. However, in the implementation of urban planning and construction, they often run into trouble, and some purely “from scratch” urban road network density indicators are difficult to meet this requirement. What is the main reason? The road network density and the neighborhood scale are closely related. In order to quantitatively describe the correlation between the two, the length and width of 1 km of land for 4,9,16,25,36,