Safety evaluation and simulation research on the accident of expressway

Traffic accidents brings a great loss of economy and property, and even the human life. The paper make a research of the safety evaluation of Jingjin Road, Tongshun Road and Tongma Road and using the principal component analysis. in all the three roads, the road condition of Tongma Road ranks the worst and it is used as the main research object to find a corresponding security project; at last, the security project is tested by the simulation of the control of speed and signal lights and traffic channelizing in the visual scene. Through the test, the security of the project turns out to be feasible and the result of the research means a lot in the security of the road safety.