According to the current situation that highway accidents happen frequently, it is necessary to evaluate the highway safety system in order to effectively reduce the incidence of traffic accidents and establish a sound mechanism for highway management. Through the identical-different-contrary analysis of every safety index of the system and the connection degree, an evaluation analysis method using set pair theory is presented. Considering the actual situation of expressway safety system, a punishment-excitation variable weight determination method is also given. By combining the set pair theory and calculating the connection degree, a set pair variable weight comprehensive evaluation method is proposed. Taking the evaluation of the Huji Expressway Safety System for example, the rationality of the evaluation method is verified. The method is simple in calculation and the evaluation results are objective and scientific, and it has great application and popularization values on the safety evaluation of highway systems.

set pair theory  /  variable weight  /  expressway  /  safety evaluation