利用北京市道路交通的实测数据 ,对比分析了国外多种信号交叉口排队长度计算方法的结果。在此基础上 ,以 SIGNAL94为基本模型 ,针对北京市交通的实际情况 ,建立了适合北京市交通特性和动态计算的排队长度优化模型。运用时间平滑处理方法减小了交通系统随机性对计算精度的影响。经过实际数据的验证 :在通常的交通条件下 ,优化模型的相对误差保持在 5 %左右。 By using the measured data of road traffic in Beijing, the result of calculating the queue length of many kinds of signalized intersections in foreign countries is comparatively analyzed. On this basis, taking SIGNAL94 as the basic model, aiming at the actual traffic conditions in Beijing, a queue length optimization model suitable for traffic characteristics and dynamic calculation in Beijing is established. The use of time smoothing method reduces the impact of traffic system randomness on the calculation accuracy. After the actual data validation: Under normal traffic conditions, the relative error of the optimization model remained at about 5%.