在我国众多中小城市的典型路段上，普遍存在机非隔离带出入口密度过大的问题，严 重影响了城市道路的通行能力和通行安全，而通过出入口管理能够有效地提高城市主道路交 通安全性与运行效率。以北京市怀柔城区青春路作为研究实例，应用正交实验法对交通仿真 软件进行参数标定，再使用仿真软件对出入口改善措施的效果进行对比分析。通过正交实验 产生32 组实验方案，每个方案应用3 个随机种子，每个种子方案运行2h，结果表明：最小穿 越间隙和期望车速分布是与中小城市车辆行驶速度相关性最强的2 个参数，运用标定后的仿 真平台对青春路出入口改善措施进行效果评价后发现，合理的出入口管理措施能够使路段运 行速度提高1.8~4.4km/h。

In many medium and small cities of China, it is a problem in the typical roads that access density is too large. This phenomenon seriously affects the traffic capacity and traffic safety of urban roads. Access management may improve the safety and efficiency of arterial roads effectively. Qingchun Road in Huairou District of Beijing was taken as an example and the orthogonal experiment method was used to calibrate the parameters of simulation software and the before-after effects of the access improve⁃ ment measures were compared. 32 cases were generated in orthogonal experiment. 3 random seeds were conducted for each case. Each seed case ran 2 hours. The experimental results show that the minimum gap time and the desired speed distribution are two parameters most relevant with the running speed in medium and small cities. By using the simulation platform after calibration to measure the performance of access improvements of Qingchun Road, the conclusion is drawn that reasonable access management measures can increase the average travel speed by 1.8~4.4 km/h.