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车辆换算系数是通行能力研究中的重要参数，本文在介绍国内外车辆换算系数的基础上，采用微观分析方法，对辽宁、黑龙江等北方寒冷地区的不同车型组合条件下的车头时距进行分析，根据对车队连续跟随行驶条件下车头时距与速度的关系，建立最小安全车头时距模型，并利用实测数据对模型参数进行标定，以实测数据计算安全车头时距，最后利用Huber公式得到车辆换算系数值以及不同车型组合及混入率条件下的车辆换算系数。
Vehicle conversion factor is an important parameter in traffic capacity research. Based on the introduction of vehicle conversion factors at home and abroad, this paper analyzes the car head time under different vehicle types in Liaoning and Heilongjiang with the micro-analysis method, According to the relationship between the headway and speed under continuous driving conditions, the minimum safety headway model is established, and the model parameters are calibrated by the measured data. The safe headway is calculated based on the measured data. Finally, the Huber formula is used to obtain the vehicle conversion Coefficient values and vehicle conversion factors under different vehicle combinations and mixing rates.