陕西省公路交通可达性时空演变研究

The spatial-temporal evolution of highway traffic accessibility in Shaanxi province

区域交通可达性演变是其空间格局变化的基础。文中基于对作为西部大开发门户的陕西省公路交通发展特征分析基础上,采用可达性以及可达性系数对陕西省公路交通的不同阶段进行定量。分析表明:可达性空间格局形成以关中地区为中心向外围地区逐渐延伸,大致呈现不规则的环状分布格局;可达性格局呈现明显的道路指向性,呈现轴线特征;陕西省区域交通可达性空间格局总体变化不大,可达性总体水平呈现出较大的提高,结构在不断优化,地区间存在的不均衡性态势逐渐缩小。

The evolution of the regional traffic accessibility is the basis of its spatial pattern change.Based on the analysis about the characteristics of highway traffic development in Shannxi province which act as a gateway of development of the west regions,we applied coefficient of accessibility and the accessibility to quantify the different stages of the Shaanxi provincial highway traffic.Analysis results showed that spatial pattern of accessibility roughly showed an irregular ring pattern,the Guanzhong area was to be as the center and gradually extended to outlying areas;Spatial pattern of accessibility apparently showed roadway directive property and axis characteristics;The overall level of accessibility showed greater improvement,the structure was constantly optimizing and the existing regional imbalance was gradually shrinking.