Researched the visibility reduced the road adhesion coefficient decreases in fog keep the safety speed. Mainly consider the fog of the number density, moisture content and other basic characteristics, to study the highway traffic visibility and road surface friction coefficient, and the establishment of the quantitative impact of the relational model. Used the model calculate the basic characteristics of the fog date of the past, such as Chongqing 、Nanjing and observations in china, to get the safety speed in different fog environment. On the study provide proposals driving in the fog.%针对雾天高速公路行车能见度下降和路面附着系数减小的情况,从雾微观结构角度对安全车速进行研究.主要考虑雾的数密度、含水量等基本特征量,研究其对高速公路行车能见度和路面附着系数的影响,并建立了定量影响关系模型.利用模型对以往重庆、南京等地区观测的雾的基本特征数据进行试算,得到不同雾环境下安全行车速度.就分析结果对雾天高速公路行车安全提出建议.
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