基于公路通达性的区域经济空间关联分析——来自全国283个地级市的实证研究

Analysis of Regional Economic Spatial Linkage Based on the Road Accessibility:An Empirical Study of 283 Prefecture Level Cities in China

交通基础设施是实现区域经济空间联系的基础条件和重要支撑。基于城市公路加权平均最短旅行时间计算的通达性对我国城市以及区域间的经济联系强度和空间分布产生显著影响。从空间分布格局看,公路通达性基本呈现由中部地区到东西部地区下降的空间分布形态,中部地区通达性水平最高;但东部地区的通达性水平增速最快。在区域经济空间关联层面,东部地区的经济联系总量远高于中西部地区,但中部地区的经济联系总量增幅最快。城市经济引力随经济距离增大而衰减的现象依然明显,省会城市的经济空间联系主要集中在以其为核心的城市群(经济圈)周围地区。

Transport infrastructure is the basic condition and important supportive base for regional economic spatial linkage. The accessibility based on the weighted average shortest travel time of prefecture level cities has a significant impact on the intensity and spatial distribution of China's urban and regional economic linkage. From the perspective of spatial distribution pattern,the road accessibility continuously reduces from the middle region to the eastern and western regions. The middle region has the highest accessibility level,while the eastern region has the fastest growth rate.From the perspective of regional economic spatial linkage,the economic linkage in eastern region is much higher than other regions,but the total economic linkages show the fastest growth in the middle region. The phenomenon of urban economic gravity decays with the increasing economic distance is still evident,the economic spatial linkage of the capital city mainly concentrated in the area around the city group( economic circle).