Abstract: This paper introduces the main ways of the optimization of traffic resources at intersections in cities based on the view of space design, and discusses those forbidding left-turning and puts forward three new methods leading left-turning traffic at intersection: 1. turning around at a section of highway; 2. special bus driveway; 3. structuring plane-crossroad with spur track. These methods will solve the problem that increases circumambulating-distance because of the forbidding left-turning of vehicles at intersection.

Key words: city, intersection, traffic resource, optimization

摘要： 从空间设计的角度介绍了城市道路交叉路口资源优化的主要方式，并就其中的主要形式——车辆禁左的方法进行阐述，提出了通过路段掉头、利用支次路形成平面立交以及利用会交专用道掉头来疏导交叉路口左转车流的三种新思路，解决了因交叉路口禁止车辆左转而带来的绕行距离增加的问题。

关键词: 城市, 路口, 交通资源, 优化