区域高速公路网络构建对可达性空间格局的影响——以安徽沿江地区为实证

IMPACT OF REGIONAL EXPRESSWAY NETWORK ON THE ACCESSIBILITY PATTERN——THE CASE OF THE BELT ALONG THE YANGTZE RIVER IN ANHUI PROVINCE

以安徽沿江为实证,采用加权平均旅行时间指标,分析了高速公路网构建对节点区内联系及区外联系可达性格局的影响,并以此为基础,综合分析了节点总体可达性格局的变动;随后对总体可达性的变动幅度及其相对可达性变动格局进行了探讨。结果表明:安徽沿江高速公路网络的构建显著提高了区域整体可达性,且促进了可达性的均衡化;区内联系可达性、区外联系可达性及总体可达性三者格局特征不同,路网构建所形成的影响也各有差别;东部及北部地区可达性变动幅度小于西南部地区;根据可达性系数的变化幅度及方向,可将节点归为相对可达性下降、相对可达性稳定及相对可达性上升3类。

Taking the case of the belt along travel times as indicator, the impact of re pattern of internal and exterior region was was elaborated in this paper. The variation pattern was also discussed. Based on the the Yangtze River in Anhui Provi gional expressway network cons analyzed. extent of nce, selecting weighted mean truction on the The evolution pattern in the integrated integrated above, some conclusi accessibility and ons were drawn accessibility accessibility its relative accessib as the followings. construction of expressway network will greatly improve the regional accessibility, and contribute to ility the the equilibrium of accessibility distribution as well,the internal, exterior and integrated accessibility pattern are different from each other,so are the impacts caused by the expressway network construction; the east and the north is lower than the southwest in the extent of accessibility variation extent and direction in accessibility coefficients after the construction, the n ;according to the variation odes are divided into three categories-nodes with declined, little changed and improved relative accessibility, respectively.