In this study, the maintenance techniques of expressway geotechnical structures have been reviewed for the last 50 years. And, throuth this, necessary maintenance technology was derived in the future. As a result, the maintenance of the geotechnical structures was mainly developed for slope structures. And slope information system, alarm system, etc. have been developed and applied. In the future, technological advancement will be achieved by applying the 4th industry revolution technology.

• 도종남(한국도로공사 도로교통연구원 안전연구실) | Do Jong-Nam
• 김낙영(한국도로공사 도로교통연구원 안전연구실) | Kim Nag-Young