Kyunggi Province, Republic of Korea

Abstract: The current procedure of estimating accident reduction benefit applies fixed accident rates for each road level. So that estimating accident reduction benefit is not considering the various characteristics of roadway geometries and traffics. In order to solve the problems mentioned in the above, models were developed considering the characteristics of roadway alignments and traffic characteristics. The developed models can be used to estimate the accident rates on new or improved roads. First of all, factors influence accident rates were selected. Those factors such as traffic volumes, intersections, connecting roads, pedestrian traffic signals, existence of median barrier, lanes are also selected based upon the obtain ability at the planning stage of roads. In this study, roads were classified into 4 groups based on lanes, roads level and the existence of median barriers. The regression analysis had been performed for each group with actual data associated with traffic, roads and accidents