Fuzzy Evaluating Method to Distinguish Black Spot

To improve road traffic safety,it is essential to differentiate the black spots.For road sections and intersections with great difference in pavement condition and the traffic pattern,the precision of differentiation can't be assured by use of traditional method.And based on the concept of traffic safety characteristic of uncertainty with possible different oppions and assessment expressions,a fuzzy evaluating method is put forward.By analysis and comparison,the indexes that the method adopts include the mortality rate per hundred million vehicle kilometer,the mortality rate per ten thousand vehicles,the equivalent accident number per ten thousand vehicles and the ponderance index of accident.A fuzzy mathematics model is set up to differentiate the black spot with example in Harbin city.