为了提高微观交通仿真评价分析的精度和可信度，需要根据实际交通情况对微观交通模型 关键参数进行校核。校核分析了VISSIM 微观交通仿真模型中关键驾驶行为参数和车辆动力性能 等参数，选取信号交叉口车头时距作为仿真校核目标参数，提出了信号交叉口仿真参数校核流 程。通过实际调查重庆市多个信号交叉口，统计得到车头时距分布关系，对仿真校核流程进行了 实例验证。实例验证结果表明，经过参数校核后构建的仿真场景与实际交通运行状态相吻合，以 此进行仿真评价分析具有较高的可信度。

In order to improve the accuracy and reliability of microscopic traffic simulation analysis, the key parameters of microscopic traffic model should be calibrated according to the actual traffic situation. The key parameters of driving behavior and vehicle dynamic performance in microscopic traffic simula⁃ tion model VISSIM were calibrated. Headway distribution at signalized intersection was selected as the simulation calibration target parameter, simulation parameters calibration process at signalized intersec⁃ tion was proposed. Through investigation of plurality signalized intersections in Chongqing, the headway distribution relationship was obtained to verify the calibration process. Verification result shows that sim⁃ ulation scenario based on calibration coincides with the actual operation state of the traffic well. In this simulation analysis, evaluation has high credibility.