An analysis method for uncovering the nature of road traffic accident based on Gray relation

Road traffic system is composed of four factors: driver, vehicle, road and traffic surroundings, and traffic accidents can be brought out by the disorder of these four factors. This study develops a method to analyze the causes of traffic accidents happening in one "hazardous" road based on Gray relation. To describe an accident, some detailed items which belong to the four factors are chosen, and their weights are fixed on with analytic hierarchy process. Then, the actual road traffic accidents data collected from the "hazardous" road are used to evaluate risk levels of all these factors and items with the weighted method. Gray relation method is applied to identify the relations between accidents and the four factors, and to analyze the causes of driver's unsafe acts. The analysis results can be used to improve road traffic safety.