城市信号交叉口导向车道线长度模型

为提高城市信号交叉口进口道通行能力与安全水平，基于导向车道线与导向箭头的关系，分析进口道驾驶员心理特征与车辆运行行为，提出导向车道线长度模型．该模型由导向箭头识别距离、驾驶员反应距离、操作距离、停车安全距离和车辆排队长度等定量化部分构成，并以福州市某交叉口东进口道为例进行计算与仿真．仿真结果表明：导向车道线长度适宜范围为76～96m；10个评价方案中，最优长度值为86m，对应进口道单车平均延误为28s，平均速度为32km／h．在模型所得长度范围内，存在交通运行水平最优的导向车道线长度值．

Model of Guiding Lane Line Length at the Urban Signalized Intersection

To improve the capacity and safety level of urban signalized intersection approach, based on the relation between guiding lane line and guiding arrow, drivers＂ psychology characteristics and vehicle running behavior at the approach were analyzed, to put forward the guiding lane line length model. The model is composed of some quantitative parts, such as guiding arrow recognition distance, driver reaction distance, operation distance, safe parking distance and queue length, and the eastern approach of a certain intersection in the city of Fuzhou was taken as an example for calculation and simulation. The simulation results indicate that the suitable range of guiding lane line length is 76-96m, and in the ten evaluation programs, the optimal length is 86m with average delay per vehicle as 28s and average speed as 32km/h at the corresponding approach. There is a optimal guiding lane line length value which leads to the highest traffic running level in the length range calculated from the model.