This study quantitatively assess the risk of ice-related accidents on road facilities such as bridges and tunnels, and examines the influence of road facility characteristics on ice-related accidents. Ice-related accident data from expressways and national highways in South Korea were collected over a 10-year period (2013–2022). Geographic information systems (GIS) and node-link systems were employed to classify accidents based on road facility types. The number of ice-related accidents per unit length and per individual segment was examined according to the road classification. Furthermore, the fatality rate and fatality-weighted indicator (FWI) were calculated to evaluate the severity of icerelated accidents.The number of ice-related accidents per unit length of road facilities is higher on national highways than on expressways. For both expressways and national highways, the incidence rate of ice-related accidents on bridges was higher than those on ordinary sections and tunnels. A greater number of ice-related accidents occurred on long-span bridges and tunnels for both road classifications. The fatality rate of ice-related accidents on expressways was approximately 1.5 times higher than that on national highways. The fatality rate of ice-related accidents occurring on road facilities within expressways was approximately three times higher than the overall fatality rate of ice-related accidents on expressways. On national highways, the fatality rate of ice-related accidents on bridges was higher than the overall fatality rate of ice-related accidents, whereas the fatality rate of ice-related accidents in tunnels was lower than that on national highways. The FWI of ice-related accidents on bridges and tunnels was more than twice that on ordinary sections on both expressways and national highways. Among expressway facilities, tunnels exhibited the highest FWI, whereas on national highways, the FWI values for bridges and tunnels were similar. The findings of this study suggest that the influence of road facilities on ice-related accidents should be considered in winter road maintenance strategies. This could contribute to reducing not only the frequency of ice-related accidents, but also the number of fatalities and injuries resulting from such incidents.

ABSTRACT
1. 서론
2. 결빙사고 자료 수집 및 분류
3. 도로 등급별 도로시설물 단위 연장 당 결빙사고
4. 도로 등급별 도로시설물 개별 연장에 따른 결빙사고
5. 도로 등급 및 도로시설물 유형별 결빙사고 심각도
6. 결론
REFERENCES

• 진현호(인하대학교 스마트시티공학과 석사과정) | Jin Hyun Ho
• 김세호(인하대학교 스마트시티공학과 석사과정) | Kim Se Ho
• 송기영(인하대학교 토목공학과 박사과정) | Song Ki Young
• 정진훈(인하대학교 사회인프라공학과 교수, 공학박사) | Jeong Jin Hoon Corresponding author