Application of Matter-element Theory for Systematic Safety Risk Grading on Expressways

Traditional risk assessment methods for expressways cannot accurately evaluate in a dynamic manner and have certain limitations. The model established by the matter-element extension method can handle uncertainty and fuzziness dynamically and is a new type of mathematical model. This paper takes road alignment, subgrade and pavement, traffic safety facilities, and traffic environment as evaluation indicators, and uses the matter-element extension method to establish an evaluation model and calculate the results. The model effect is verified by the Xin-Yi Expressway. According to the calculation, the Xin-Yi Expressway is divided into 14 sections of low-risk level (Level I), 16 sections of relatively low-risk level (Level II), and 0 sections of general and high-risk levels. This paper finds that the safety risk classification model established by the matter-element extension method has certain feasibility and applicability and can dynamically evaluate the safety risk indicators of road sections based on traffic factors.