信号交叉口设置可变导向车道的阈值条件研究

摘要

According to the specific intersection form, the traffic flow and other factors are analyzed.Taking the import road vehicle delay as a criterion and the left-turn and straight traffic flow as the main criteria, a comprehensive model of variable approach lane threshold is established by considering all kinds of factors and then the threshold curve is drawn.According to an actual intersection of Wuhan, the threshold condition is studied and a comparative analysis is conducted using VISSIM simulation.Research results show that: when setting the variable approach lane in cross intersection having not less than four lanes on one way and a left-turn lane, the total delay of the target import road is reduced by 34.6%.The intersection efficiency is improved, and the reliability of the model and the method is verified.%通过对进口道交通流量、交通流向等因素进行分析,以交叉口进口道车均延误为判别指标,以进口道左转、直行流量为主要判别条件,综合考虑各类因素的影响,建立交叉口可变导向车道控制阈值综合模型,并绘制阈值曲线.以武汉市某一交叉口为例,进行可变导向车道属性改变阈值研究,并运用vissim仿真对属性改变前后的效果进行对比分析.结果表明,在单向不少于4车道且有1股左转专用道的十字交叉口,设置可变导向车道可以降低目标进口道总延误34.6%,路口通行效率大幅提高,验证了该模型及判别方法的可靠性.