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Speed Control System Analysis of Freeway Work Zone Based on ITS

Vehicle speed control is one of the main methods to ensure the safety of freeway work zone. In order to control vehicle running speed reasonably in freeway work zone, the research of adaptive speed control of freeway work zone is carried out. Based on the analysis of the speed change law of the vehicles nearby freeway work zone, combined with the electronic sensor technology and data transmission technology, an adaptive vehicle speed control measure of freeway work zone based on ITS is proposed. Then the theoretical framework of adaptive speed control measure in freeway work zone is built, and the effectiveness validation of the solution is taken. The measure could decrease the speed difference between the upstream and downstream vehicles, as well as reducing the occurrence probability of traffic accidents such as rear-end. Meanwhile, it can effectively improve the traffic capacity of freeway work zone on the premise of ensuring safety.