中文摘要：

针对于T形交叉口早晚高峰期间公交车左转并线造成对直行车辆延误导致机动车通行效率降低的问题进行研究.采用设置公交专用间接左转车道的方法对交叉口进行优化设计,并利用VISSIM微观仿真模型对北京现况某T型路口仿真.选取平均延误时间与排队长度作为评价指标,建立不同交通量下车辆延误、排队长度的曲线,得出优化设计的使用条件以及应用优化方案后的优化结果,为公交专用间接左转车道的设置提供一定的设计依据.

英文摘要：

Based on summary of the reason of traffic congestion at intersection,the lanes-changing behavior of bus was considered an important factor.To overcome the factor,the microscopic traffic simulation software VISSIM is adopted to make simulation of the Indirect Left Turn Lanes for Bus at intersection.The average delay is used as estimation parameter.The average delay-volume curve is established based on traffic simulation,the same as queue length-volume curve.As a result,a theoretical basis of whether or not and how to take an engineering measure of Indirect Left Turn Lanes for Bus in Beijing as well as in China was provided.