城市道路快速化改造中的掉头设计策略及案例

城市道路快速化改造中经常会将一些小型红绿灯路口改为右进右出路口，沿线居民的刚性交通需求则需采用掉头形式进行绕行，因此掉头口设置比较重要。可以利用前后红绿灯进行掉头，也可以在路段中设置掉头口，有条件的也可以设置路段中的空中掉头车道。通过研究路段中间设置掉头口的相关情况，提出了掉头设计策略，给出了相关案例分析，希望对解决城市道路快速化改造中的车辆掉头问题提供一些有益的参考。

Design Strategies and Cases of Turnaround in Express Reconstruction of Urban Road

In the express reconstruction of urban roads, some small traffic light intersections will often be changed into the right-in and right-out intersections, and the rigid traffic demand of residents along the line will need to take the form of turn around. Therefore, the setting of turnaround intersection is more important. The front and rear traffic lights can be used to turn around, and the turnaround intersection can be set in the road section. And the air turn lane can be also set in the road section if permitted. By studying the relative situation of setting the turnaround intersection in the road section, the design strategies of turnaround are put forward. The relevant case analysis is given. It is hoped to provide some useful reference for solving the problem of vehicle turnaround in the express reconstruction of urban roads.