Road Safety Evaluation Based on Vague Set Theory
Yongping Wei, Jianxiao Ma · 2010
To improve the shortcoming of fuzzy evaluation model based on fuzzy comprehensive evaluation, a method of road safety evaluation was presented based on a vague set. Firstly, according to the attribute set and attribute measurement theory in mathematics, true membership function, false membership function and hesitate degree function of evaluation index are constructed. Then the vague value of each evaluation index can be calculated out by these functions. Secondly, the score value of each evaluation year is gained by a weighted score function. To provide the reference for the traffic safety decision-making, the road safety condition of each evaluation year can be ranked by the score value. Finally, an application of the method to a case study indicates that proposed method is effective and practical.