Traffic Control Site Selection for Freeway Management in Mountainous Areas under Foggy Conditions

In order to ensure the traffic safety of freeway in fog, it is necessary to take traffic control measures. Based on the road networks conditions of mountainous freeway, and the analysis of driver´s travel behavior as well as the requirement of traffic control in fog, it brings forward the selection principles of traffic control site for freeway management under foggy conditions, researches on the technology of traffic control site selection under static and dynamic traffic conditions, sets up an algorithm of traffic control site selection, and then proposes the recommended standard of dynamic traffic control for mountainous freeway in fog from those aspects like vehicle mobility pattern, sight distance support and information distribution, etc.