판별모형을 통한 청주시 비신호교차로 사고요인 분석

This study deals with the traffic accidents at the unsignalized intersections in Cheongju. The goal is to find out the accident factors by accident type and location at the 3-legged and 4-legged intersections using the discriminant model. Based on the accident data base of Chungbuk Provincial Police Agency(2004) and the field survey data, the geometric elements, environmental factor and others were analyzed. The main results are the followings. First, 12 discriminant models for 3-legged and 10 models for 4-legged were calibrated, and all the models were analyzed to be statistically significant. Second, the accident factors by type and location are analyzed for 3 and 4-legged intersections. This study could be expected to give some implications to the safety improvement projects.