Highway Traffic Safety System In Fog Area

With rapid development of highway construction and increase the number of cars, highway traffic accidents rate increased more and more quickly. Heavy fog not only affects the traffic capacity of the highway, but also causes casualties and brings huge economic losses, so now it causes our government and the transportation department's attention in recent years.Based on the analysis of highway traffic safety influence, traffic accident characteristics and traffic flow vehicle-following theory model, the paper discuss the speed limit in the situation of chronic vehicles or obstacles in front of highway,or single driving lane in the conditions of a low-visibility fog zone or highway road friction coefficient is small. According to the traffic environment and theoretical analysis, discussing how to quickly calculate the value of the fog zone highway speed limit in VB programming software. In order to provide a theoretical basis of speed control in fog weather, different sections, and different indicators of traffic volume, visibilities and so on for traffic management department.At the same time, combined with the actual situation in highways and traffic safety affecting, the paper will also put forward highway traffic safety monitoring system, traffic management measures, emergency rescue system in fog zone, and how to implement the aboved systems. Construct a set of building-operation-management-monitoring-the fog event handling highway safety guarantee system, which can effectively prevent, monitoring, handling fog area traffic accidents.In this way,it will provide safety for fog zone of highway to some extent.