PURPOSES : In this study, a method for improving roadside barrier performance by introducing additional reinforcing materials without dismantling or drilling the old underperforming roadside barrier is developed based on the Installation and Management Guide for Roadside Safety Feature.
METHODS : Reinforcing roadside barriers comprising reinforcement rails, impact absorbers, blockouts, and support reinforcement plates attached to an old underperformance roadside barrier were designed and manufactured. The manufactured prototypes were subjected to a vehicle crash test to verify their performance.
RESULTS : In a structure whose performance is measurable after it collides with a large truck, the minimum strength of the structure to withstand the collision is maintained. Additionally, the safety of passengers measured via the collision test of a small vehicle is excellent. Hence, the reinforcement plan for the old underperforming roadside barrier satisfies all the performance evaluation standards.
CONCLUSIONS : The cost of the improvement technology specifications proposed herein is approximately 50% lower than that of a SB3 level roadside barrier. The proposed method for improving the old underperforming roadside barrier is expected to be widely applied as it can be applied conveniently to road sites.

ABSTRACT
1. 서론
    1.1. 논문개요
    1.2. 연구배경 및 목적
    1.3. 참고문헌 고찰
    1.4. 국내 성능 시험조건 및 평가기준
2. 본론
    2.1. 기존 성능미달 구형 노측용 방호울타리
    2.2. 성능보강 방안
    2.3. 실물차량 충돌시험을 통한 성능검증
3. 결론
REFERENCES

• 주재웅(한국도로공사 도로교통연구원 수석연구원) | Joo Jaewoong Corresponding author
• 장대영(한국도로공사 도로교통연구원 책임연구원) | Chang Daeyoung
• 안성기((주)한국배리어 대표이사) | An Seongkee