基于车辆实际运行轨迹的平面交叉口左转待行区模型构建

Model Construction of Left-Turn Waiting Zone at Intersection Based onActual Vehicle Running Trajectory

为规范设置城市平面交叉口左转待行区,利用无人机航拍视频,分析了实际左转车流与交叉口几何参数的关系,使用线性识别的方法,明确了交叉口车辆左转轨迹由2段缓和曲线组成,构建了以交叉口几何参数为自变量、左转待行区长度和半径为因变量的车辆左转轨迹的函数模型,并实例分析验证了模型的有效性,研究成果可为城市平面交叉口左转待行区合理有效的渠化设计提供参考。

In order to normalize left-turn waiting zone of urban intersection,,the relationship of the actual left-turn traffic flow and geometric parameters of intersection is analyzed through UAV aerial video.According to linear identification method,it is identified that the left-turn trajectory of vehicles at the intersection is composed of two moderate curves.The left-turn trajectory of vehicles for function model is built with geometric parameters as independent variable to intersection,length and radius of left-turn waiting area as the dependent variables.The validity of the model is verified by an example analysis,and the research results can provide a reference for the reasonable and effective channelization design of left-turn waiting areas at urban plane intersections.