Modelling road traffic accident rate and road geometric parameters relationship

Road geometric design is strictly related to the level of a road traffic accident. Numerous accidents are caused by the inappropriate design of road geometric. This study aimed to determine the relationship model of road geometric parameters and accident rate. Jember – Banyuwangi national road was chosen as a location of the study. Five independent variables named the radius of bend, the degree of curvature, super-elevation, widening of the curve, and side freedom were used. Meanwhile, there are three dependent variables modelled, namely EAN (Equivalent Accident Number), accident level, and accident number. The model was obtained and tested using the statistic approach. The results showed that there was a strong relationship between EAN and side freedom. Furthermore, side freedom also proved to have a strong relationship with the accident number. The direction of future study is presented.