To change the situation in fog area of china that the coordination between managements is poor and the efficiency of emergency rescue is low in fog weather, this paper builds up a Highway Emergency Command System by summarizing the national and foreign disposal strategies of fog road transportation safety, which can assist the road maintenance department, emergency management and traffic management to carry out the scientific decision-making. It also analyzes the traffic measures for road maintenance personnel, emergency management personnel, traffic management and traffic participants from the points of fog monitoring and evaluation, fog driving environmental improvement, the dissipation of fog, traffic evacuation of fog weather, traffic control of fog weather, traffic guidance and information dissemination of fog weather and so on, gets a guarantee system of fog transportation safety, has a guiding role to perfect our country's road transportation safety management in foggy environment.