路面行车舒适性主要受路面平整度的影响，目前主要有主观感受、行车振动以及 驾乘人员的心生理变化3 种评价方法． 由于测试对象、测试方法及评价标准不同，不同方 法对路面行车舒适性评价的准确性不同，评价结果也有一定的差异． 为了提升路面行车舒 适性评价的准确性和客观性，文中利用平整度范围为1． 06 ～5． 53m/km 的12 条沥青路面 的室外乘车试验结果，提出了采用 D-S( Dempster-Shafer) 证据法对3 种评价方法进行决策 融合的路面行车舒适性综合评价方法． 研究结果表明:采用 D-S 证据法建立的基于路面平 整度的行车舒适性综合评价体系能够显著降低各评价方法的不确定性，验证了模型的有 效性，得到了综合3 种舒适性评价方法的路面平整度绝对阈值;速度对综合评价体系的不 确定性下降比例有重要的影响，符合实际情况． 

 Ｒoad driving comfort is mainly affected by the pavement roughness． At present， there are three evaluation methods: subjective feeling，driving vibration and heart physiological changes of drivers and passengers． Due to different test objects，test methods and evaluation criteria，the accuracies of different methods for road driving comfort evaluation are different，and the evaluation results are also different． In order to improve the accuracy and objectivity of road driving comfort evaluation，a comprehensive evaluation method for road driving comfort using D-S ( Dempster-Shafer) evidence method for decision-making fusion of three evaluation methods was proposed to test the outdoor riding test results of 12 asphalt pavements with roughness changing from 1. 06 ～5. 53m/km． The research results show that the comprehensive evaluation system of driving comfort based on road roughness established by D-S evidence method can significantly reduce the uncertainty of each evaluation method，verify the validity of the model，and obtain the absolute threshold of road roughness with 3 kinds of comfort evaluation methods; the speed has an important influence on the proportion of uncertainty in the comprehensive evaluation system，which is in line with the actual situation．