PURPOSES : This study aimed to identify factors affecting the duration of traffic incidents in tunnel sections, as accidents in tunnels tend to cause more congestion than those on main roads. Survival analysis and a Cox proportional hazards model were used to analyze the determinants of incident clearance times. METHODS : Tunnel traffic accidents were categorized into tunnel access sections versus inner tunnel sections according to the point of occurrence. The factors affecting duration were compared between main road and tunnel locations. The Cox model was applied to quantify the effects of various factors on incident duration time by location. RESULTS : Key factors influencing mainline incident duration included collision type, driver behavior and gender, number of vehicles involved, number of accidents, and post-collision vehicle status. In tunnels, the primary factors identified were collision type, driver behavior, single vs multi-vehicle involvement, and vehicles stopping in the tunnel after collisions. Incidents lasted longest when vehicles stopped at tunnel entrances and exits. In addition, we hypothesize that incident duration in tunnels is longer than in main roads due to the reduced space for vehicle handling. CONCLUSIONS : These results can inform the development of future incident management strategies and congestion mitigation for tunnels and underpasses. The Cox model provided new insights into the determinants of incident duration times in constrained tunnel environments compared to open main roads.

1. 서론
2. 기존문헌고찰
3. 연구수행방법
    3.1. Cox 비례 위험 모형
    3.2. 분석데이터
4. 분석결과
5. 결론
REFERENCES

• 박수빈(한국건설기술연구원 박사후연구원) | Park Subin
• 양충헌(한국건설기술연구원 연구위원) | Yang Choongheon (Research Fellow Korea Institute of Civil Engineering and Building Technology, 283, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea) Corresponding author
• 김진국(한국건설기술연구원 전임연구원) | Kim Jinguk
• 이진각(㈜내일이엔시 도로교통안전연구소 소장) | Lee Jinkak
• 최윤혁(한국도로공사 도로교통연구원 수석연구원) | Choi Yoonhyuk