成渝城市群陆路交通可达性演变研究

On Evolution Of Land Traffic Accessibility in Chengdu-Chongqing Urban Agglomeration

交通基础设施建设对区域发展具有支撑作用。基于成渝城市群2000年、2007年及2014年路网数据,在Arc GIS软件支持下,以平均可达性、最近节点可达性及县(区)腹地范围为测度指标,从全域和局域可达性两个视角对成渝城市群可达性演变进行深入分析。结果表明,高等级路网建设及其完善程度与区域可达性水平提升呈现显著正相关关系。成渝城市群交通发展需要提升区域边缘县区的县乡道路网密度,构建边缘地区对外快速通道,打造区域"轴—辐"式陆路交通网络格局。

The construction of transportation infrastructure plays a supporting role in regional development.Based on Chengdu-Chongqing urban agglomeration road network data in 2000,2007 and 2014,from the global perspective and local reachability,the evolution of Chengdu-Chongqing urban agglomeration was analyzed under the support of Arc GIS software,with the average accessibility,the nearest node accessibility and county hinterland as measure index. The results show that,there is a significant positive correlation between the construction of high grad road network and the improvement of regional accessibility level. For the development of Chengdu-Chongqing urban agglomeration,one needs to raise the network density of county road,speed up the rapid access of border counties and construct the ＂hub-and-spoke＂land traffic transportation system.