Study on Safety Evaluation of Urban Road Traffic Based on Gray Theory

A variety of indexes affect the safety evaluation of urban road traffic making the evaluation quite difficult. By integrating the characteristics of road traffic management in China, three indexes are selected, of which the evaluation standard is determined with cumulated percentage frequency. Based on the general analysis of evaluation methods both at home and abroad, the gray evaluation method of urban road traffic safety is established. By applying the gray system theory, three indexes of road traffic safety are induced and calculated to categorize the gray type of cities to more rationally evaluate the situation of traffic safety. Also by this method, the situations of traffic safety in five provinces and cities in 2001 are comprehensively evaluated.