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Traffic Accident Prediction Model by Freeway Geometric Types  

강정규 (한국도로공사 도로연구소)
이성관 (한국도로공사 도로연구소)
Publication Information
Journal of Korean Society of Transportation / v.20, no.4, 2002 , pp. 163-175 More about this Journal
Abstract
Fatalities from traffic accidents constitute one of the major health issues as well as safety ones in Korea. It has been reported that traffic accident is affected by the combined effects of road. vehicle. and human factors. Over the past few decades, a number of studies have been conducted to find the impact of road geometric factors on traffic safety. The purpose of this study is to investigate the effect of road geometric factors on traffic safety on Korean expressways. Detailed geometric design data were available from Korea Highway Corporation. Five-year traffic accident data on Honam expressway were collected and analyzed. It was found that following geometric factors influence traffic safety on expressways : radius of curve, curve length, and length of straight section. Furthermore, the existence of I.C. turned out to have a significant impact on traffic safety level. Based on the data analysis several multiple regression forms that relate traffic accident frequencies and geometric factors on expressways are developed.
Keywords
교통사고;도로안전도;도로선형;교통사고 예측모형;선형회귀분석;
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