Optimization method for urban intersection and empirical research from the perspective of safety

Reasonable organization and optimization of intersection safety operation is the key to solving the problem of urban traffic congestion and improving urban traffic safety. Firstly, by summarizing a variety of optimization measures and methods of intersections, this paper put forward the optimization idea of adding "safety" elements. Secondly, taking the intersection of Tianhua South Road and Liuzhou East Road in Nanjing as an example, based on the actual traffic survey data, two optimization schemes were designed by using this method. Finally, through the VISSIM traffic simulation software, the optimization scheme was simulated, analyzed, evaluated and compared, the applicability of the scheme was verified, and the best optimization scheme was selected, which has effectively improved the traffic problems of the intersection of South Tianhua road and East Liuzhou Road.