Amendment of Quality Control Method in Identifying Black Spots

The generation of traffic accident has stochastic properties, but accident-prone locations can be identified by its regularities. Quality control method is a more extensive application method, but because of its neglect of the severity of the incident for the black spots impact, so the application range is suffered limitation. Based on the analysis of the grade of traffic accident, using equivalent traffic quantity instead of traffic quantity, and then analyzing its statistic distribution characteristic, the quality control method was modified. For the modified quality control method will have much more broad application range and differential effects.