PURPOSES : Long-life asphalt pavements are used widely in developed countries. In order to be able to devise an effective maintenance strategy for such pavements, in this study, we evaluated the performance of the long-life asphalt pavements constructed along the national highways in South Korea. Further, an economic evaluation of the long-life asphalt pavements was performed based on a life-cycle cost analysis. We aimed to devise a model for evaluating the performance of long-life asphalt pavements using the national highway pavement management system (PMS) database as well as for analyzing the economic feasibility of such pavements, in order to promote their use in South Korea.
METHODS : The maintenance history and pavement performance data were obtained from the national highway PMS database. The pavement performances for a total of 292 sections of 10 lanes (5 northbound lanes and 5 eastbound lanes) of national highways were used in this study. Models to predict the performances of hot mix asphalt (HMA) and long-life asphalt pavements under two distinct traffic conditions were developed using a simple regression method. Further, the economic feasibility of long-life asphalt pavements was evaluated using the Korea Pavement Management System (KoPMS).
RESULTS : We developed service-life prediction models based on the traffic volume and the equivalent of single-axle load and found that long-life asphalt pavements have service lives 50% longer than those of HMA pavements. Further, the results of the economic analysis showed that long-life asphalt pavements are superior in terms of various economic indexes, including user cost, delay cost, total cost, and user benefits, even though their maintenance cost is higher than that of HMA pavements. A comparison of the economic feasibilities of the various groups showed that group A is superior to HMA pavements in all aspects except in terms of the maintenance criterion (crack 20% or higher) as per the NPV index. However, the long-life asphalt pavements in group B were superior in terms of the maintenance criterion (crack 25% or higher) regardless of the economic feasibility.
CONCLUSIONS: The service life of long-life asphalt pavements was found to be approximately 50% longer than that of HMA pavements, regardless of the traffic volume characteristics. The economic feasibility of long-life asphalt pavements was evaluated based on the KoPMS. The results of the economic analysis were the following: long-life asphalt pavements are exceptional in terms of almost all factors, such as user cost, delay cost, total cost, and user benefit; however, the exception is the maintenance cost. Further, the economic feasibility of the long-life asphalt pavements in group B was found to be better than that of the HMA pavements (crack 25% or higher).

1. 서론
  1.1. 연구배경
  1.2. 기존연구
  1.3. 연구목적
 2. 공용수명 예측모델 개발
  2.1. 대상구간의 선정
  2.2. 일반/장수명 포장의 공용수명 예측모델 개발
  2.3. 공용수명 예측모델을 통한 공용수명의 추정
 3. 장수명 포장의 경제성 분석
  3.1. 경제성 분석 모델 개발
  3.2. 분석 대상 구간 및 시나리오
  3.3. 경제성 분석 결과
 4. 결론 및 향후 과제
 REFERENCES

• 도명식(한밭대학교 도시공학과 교수) | Do Myungsik 교신저자
• 권수안(한국건설기술연구원 국가건설기준센터 센터장) | Kwon Sooahn
• 백종은(서울시청 도로포장연구센터) | Baek Jongeun
• 최승현(한밭대학교 도시공학과 박사과정) | Choi Seunghyun