After Po-Hang earthquake(Magnitude 5.4, Nov.15. 2017), total 55 cut slopes along the expressway within 25km from earthquake source were examined if there were any signs of instabilities such as rockfalls, surface failure, cracks and wood tumbles. Examination revealed that no cut slope showed any abnomality. This result raise an issue if design of slope against seismic activity is necessary. In this paper, necessity and seismic analysis method are discussed.

Abstract
 1. 서 론
 2. 지진 후 비탈면 점검과 결과
 3. 비탈면 내진설계 필요성과 방법론 고찰
 4. 결 론
 참고문헌

• 김경석(한국도로공사 도로교통연구원) | Kim, Kyung Suk
• 장현익(한국도로공사 도로교통연구원) | Jang, Hyun Ick