【摘要】 城市道路上的车辆掉头是重要的交通行为之一，但目前国内的设计规范对其规定少之又少，实践当中设计人员基本上是参照左转来进行设计，然而车辆掉头与左转还有较大差别，因此研究车辆掉头设计非常必要。结合上海、广东等地目前车辆掉头设计方法，进行了归纳总结，按掉头的纵向位置、横向位置、是否增辟车道、是否设置信号控制进行了分类，并对掉头半径及掉头车速进行了一定的分析研究。更多还原

【Abstract】 Vehicle U-turn is one of the most important traffic behaviors on urban roads. But there are a few provisions in the current domestic design specifications. In practice, designers basically refer to left turn for design. However, there is still a big difference between U-turn and left turn of vehicle. Therefore, it is necessary to study the design of U-turn lane. Combined with the current U-turn design methods in Shanghai,Guangdong and other places, these methods are summarized. Whether or not to add the lanes and to set up the signal control is classified according to the longitudinal position and transverse position of U-turn lane. And the U-turn radius and U-turn speed are analyzed and studied, which hopes to provide some useful reference for solving the U-turn design problems.更多还原