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The Journal of The Korea Institute of Intelligent Transport Systems Vol.24 No.6 pp.35-45
비교그룹 방법을 이용한 내리막 구간 미끄럼방지포장의 사고감소 효과 분석
Road Safety Effects of Anti-Skid Pavement on Downhill Slopes Using the Comparison Group Method
Abstract
Vehicles tend to accelerate easily on downhill slopes, leading to longer braking distances and an increased risk of crashes. In Korea, the fatality rate on downhill slopes was 2.52 in 2024, approximately twice the national average for all road crashes. Anti-skid pavement has been a widely implemented countermeasure to mitigate such risks. This study examined the effects of anti-skid pavement on traffic crashes occurring on downhill slopes. Eleven downhill sections of national highways in Gyeongsangbuk-do with a longitudinal grade of 5% or more were selected as the treatment group, while 32 sections with similar traffic volumes and geometric characteristics were selected as the comparison group. Using the crash data from 2008 to 2018 obtained from the Traffic Accident Analysis System (TAAS), the Comparison Group Method was applied to examine the changes in crashes before and after installing anti-skid pavement. The results show that the total number of crashes on downhill slopes decreased by 72.6% after installation. These findings suggest that anti-skid pavement is an effective road safety treatment that significantly reduces the crash likelihood on downhill slopes.
