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以分形理论为基础，借助于GIS工具，对中国三大经济地带及六大经济区的公路网、包含公路及铁路的路网分布的空间结构形态进行了分形研究，测定了各区域路网空间体系分布的Hausdarf维数，计算了各区域的路网覆盖深度值，并在同一尺度上作了比较。结果表明我国三大经济地带由东部→中部→西部，路网分维值逐渐降低，覆盖深度值逐渐增大；六大经济区的路网分维值，按华东、中南、西南、东北、华北、西北的顺序依次减小，覆盖深度值以华东经济区与中南经济区为最小，其余按东北、西南、华北、西北的顺序逐渐增加。在此基础上，建立了路网分布与区域经济之间的关联关系，以期为路网分析和交通规划提供新的思路和方法。

Fractal Structure and Regional Difference of Spatial System of Road Network in China

Based on the fractal theory and the analysis method of GIS, the spatial structures of road networks in three economic zones and six economic districts of China are researched in this paper. The Hausdarf dimension values of the road networks of different regions are measured, and the values of the covering depth are also calculated. The values are compared in the same scale. The result shows that from eastern China to middle and western China, the value of fractal dimension of the road network becomes smaller and smaller, and the value of the covering depth becomes larger and larger. The economic districts with the largest fractal dimension value of traffic network in turn are East China, Central South China, South-west China, North-east China, North China, and North-west China. East China and Central South China has the smallest value of the covering depth, and North West China has the largest one. The relationship of regional economy and fractal dimension value of road network has been given in this research. It can provide a new method for road network analysis and transportation planning.