城镇交通通达度分析——以定西市为例

Urban Traffic Accessibility Analysis:Taking Dingxi City for Example

交通是城市与乡镇之间连接的桥梁,采用空间句法模型、区域可达性分析,利用GIS的空间差值对定西市交通通达度进行了研究。研究结果表明:(1)安定—陇西轴线交通集成度高,交通网络最强大;(2)陇西—渭源—会川—临洮的区位优势明显,但交通网络欠佳,多为国道、省道等普通道路,严重缺少高速、铁路网络;(3)位于市域南部的漳县、岷县受到复杂地形的影响路网稀疏,主轴线只有G212,应加快建设临洮—会川—殪虎桥—岷县段、殪虎桥—漳县—文峰段的高速和铁路。

Traffic is a bridge connecting cities and towns. Based on the spatial syntax model and regional accessibility analysis, we used the GIS spatial interpolation to study the traffic accessibility of Dingxi City. The results show that(1)the Anding-Longxi axis in the stable area has the highest traffic integration and the strongest traffic network.(2)The Longxi-Weiyuan-Huichuan-Lintao axis in the stable area has the distinct geographical advantages, but the traffic network is not very good, and most of them are national and provincial roads. They have a serious lack of high-speed, railway networks.(3)The road networks of Zhang County and Min County in the south of city are sparse due to the complicated topography, and the main axis is only G212. Therefore, it is necessary to accelerate the high-speed and railway construction in the Lintao-Huichuan-Yihuqiao-Min County axis and the Yihuqiao-Zhang County-Wenfen axis.