PURPOSES : The percentage of vehicle overturning accidents is 16.3% of vehicle alone fatal accidents, with a fatality rate of 9.0%, accounting for a high proportion, and heavy vehicles with a high center of gravity are vulnerable to overturning accidents. In the standard guidelines of Super-Bus Rapid Transit(S-BRT), it is recommended to install physical facilities that separate buses from other traffic on dedicated bus ways, and lane separation facilities are being developed. To develop low-profile lane separation facilities that do not interfere with sight obstruction for pedestrians and drivers, it is necessary to review the height of lane separation facilities to prevent overturning crashes of heavy vehicles.
METHODS : Heavy vehicle impact conditions of 8ton-55km/h-15°, 8ton-55km/h-20°, 8ton-65km/h-15°, and 8ton-65km/h-20°were applied to compare the vehicle behavior by the height of lane separation facilities using LS-DYNA, a three-dimensional nonlinear impact analysis program based on speed and angle changes. In addition, the behavior of the vehicle after the collision was analyzed to examine the impact conditions in which an overturning crash occurs when a heavy vehicle collides with a low-profile lane separation facility and the appropriate height of the facility to prevent overturning.
RESULTS : In general, under the 8ton-65km/h-15°condition, which is a heavy vehicle impact condition used in the performance standard of the barrier, the vehicle’s behavior after the collision was stable as the height of the lane separation facility increased.
CONCLUSIONS : Therefore, when the impact conditions were 8ton-65km/h-15°or less, it was determined that the appropriate height to prevent the condition of the lane separation facility was 400mm or more.

ABSTRACT
1. 서론
2. 기존 연구 고찰
3. LS-DYNA 충돌 시뮬레이션
    3.1. 성능 기준 및 충돌 조건
    3.2. 모델링
    3.3. 8ton-55km/h-15°시뮬레이션 결과
    3.4. 8ton-55km/h-20°시뮬레이션 결과
    3.5. 충돌 각도에 따른 차량 거동 분석
    3.6. 8ton-65km/h-15°시뮬레이션 결과
    3.7. 충돌 속도에 따른 차량 거동 분석
    3.8. 8ton-65km/h-20°시뮬레이션 결과
4. 결론 및 향후 연구과제
REFERENCES

• 노민형(한국건설기술연구원 도로교통연구본부) | No Min Hyung (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology)
• 박재홍(한국건설기술연구원 도로교통연구본부) | Park Jae Hong (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology)
• 윤덕근(한국건설기술연구원 도로교통연구본부) | Yun Duk Geun (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology)
• 성정곤(한국건설기술연구원 도로교통연구본부) | Sung Jung Gon (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology) 교신저자