文章编号： 1672-5328（2021）01-0102-10

彭挺，胡义良，张敬宇，李雪
(重庆市交通规划研究院，重庆401147)

摘要： 合理控制支路系统的规划指标对于畅通城市交通微循环、完善道路网系统具有重要作用。山 地城市道路非直线系数往往较大，且干路沿线交叉口多采用右进右出的控制方式，导致路网容量、 转向比例等指标不能客观地反映出行者到达目的地的便捷程度。针对山地城市支路建设的特点，提 出有效间距的概念，构建能够综合反映交叉口转向、路段绕行和小区内部步行时间的道路网连通效 率指标，并通过模拟分析得到支路有效间距的最优值。研究结果表明：支路有效间距宜控制在200 m 以内，且最优指标值随着步行速度的增加而单调上升；当支路非直线系数增大时，提高交叉口密度 有助于保障道路网络的连通效率。

关键词： 道路网络；支路有效间距；连通效率；山地城市

中图分类号： U491

文献标识码：A

Effective Spacing Between Local Roadways in Mountainous Cities

Peng Ting, Hu Yiliang, Zhang Jingyu, Li Xue
(Chongqing Transport Planning Institute, Chongqing 401147, China)

Abstract： Reasonable control of planning indicators of local roadway system plays an important role in smoothing the microcirculation of urban traffic and improving roadway network system. In most cases, the nonlinear coefficient of roadways in mountainous cities is relatively large, and the intersections on arterial roadway are mostly subject to the right-in-right-out control modes, which results that the roadway network capacity, ratio of turning and other indicators cannot objectively reflect the convenience for travelers to reach their destination. Based on the characteristics of local roadway construction in mountainous city, this paper puts forward the concept of effective spacing and builds the roadway network connection efficiency indicators which can comprehensively reflect the time of intersection turning, road detouring, and walking inside residential communities. The optimal value of effective spacing between local roadways is obtained through simulation and analysis. The results show that the effective spacing between local roadways should be controlled within 200 meters, and the optimal indicator value monotonously increases with the rising of walking speed. When the nonlinear coefficient of local roadways increases, increased intersection density is conducive to guaranteeing the connectivity efficiency of roadway network.

Keywords： roadway network; effective spacing between local roadways; connectivity efficiency; cities situated in mountains