Road Junction Configurations and the Severity of Traffic Accidents in Japan

In many countries, 40–60% of the traffic accidents occur at junctions, making reduction junction paramount to achieving UN Sustainable Development Goals. Japan, road safety guidelines specify proximity between junctions and non-perpendicular angles as two main risk factors behind accidents, yet their impact remains understudied. Using binomial logistic regression models, this study investigates intervals on severity accidents. The found that, in general, (1) shorter adjacent helps reduce serious which is opposite current (2) results from angle analysis were mixed but there was no evidence that roads should meet a right Some types also returned non-linear curve, e.g., vehicle-to-vehicle collisions four-armed involving driver aged 65 years over have highest fatal/serious when 32 m apart, reduces or longer interval. These suggest require updating improve around junctions.