PURPOSES: This study aimed to evaluate the performance of pavement management works and to develop a function for estimating the level of service (LOS) and cost of service (COS) for the systematic and quantitative management of pavement performance in the public sector.
METHODS: The International Roughness Index (IRI) was used as the performance index for pavement management. Long-term pavement performance data for a period of 7 years (2007-2014) collected by the National Highway Pavement Management System and historical maintenance budget data published by the South Korean government were used to develop the LOS-COS function. Based on the function, a model for estimating the appropriate budget as well as the network conditions was suggested.
RESULTS : There was high degree of correlation between pavement performance and the investment level (R = - 0.74). The developed LOS-COS function suggested that the unit cost to improve the network IRI to 1 m/km was 32.6 billion KRW. Further, the maintenance costs normalized with respect to the LOS levels were LOS-A = 88.2 billion KRW, LOS-B = 55.6 billion KRW, and LOS-C = 23.0 billion KRW.
CONCLUSIONS: This study proposes a simple way of developing a LOS-COS function. It also shows how to develop a network budget demand and condition estimation model using the LOS-COS function. In addition, it is the first attempt to evaluate the road maintenance budget in South Korea. It is expected that these results will help in the negotiations between the road managers and budget makers.

1. 서론
 2. 문헌고찰
 3. 도로포장관리의 성과지표 설정
 4. IRI지표를 이용한 서비스수준의 설정
 5. 실증연구
  5.1. 자료의 수집과 가공
  5.2. 투자예산과 성과간의 상관분석
  5.3. LOS-COS 함수추정
  5.4. LOS-COS 함수를 이용한 적정예산수요 및네트워크 상태예측 모형 개발
 6. 결론
 REFERENCES

• 한대석(한국건설기술연구원 수석연구원) | HAN Daeseok 교신저자
• 이수형(한국건설기술연구원 수석연구원) | LEE Suhyung
• 이상혁(한국건설기술연구원 수석연구원) | LEE Sang Hyuk
• 유인균(한국건설기술연구원 연구위원) | YOO In-kyoon