Development of Pavement Condition Index for Korean Asphalt National Highway and Decision Criteria for Resurfacing

long-Sub Lee ； Young-Chan Suh ； Soo-Ahn Kwon ； Gi-Yeon Kim ； Kwang-Su Lim

《International Journal of Pavement Research and Technology》 2卷3期 (2009/05) Pp. 106-114

https://doi.org/10.6135/ijprt.org.tw/2009.2(3).106

並列摘要

This paper developed a model equation to represent various pavement distresses such as crack, rutting, roughness (IRI), etc. as one combined index in order to manage the pavement of Korean asphalt national highway system at network level. Additionally, the threshold values for rut depth and crack percent for resurfacing were determined to follow the recommendation of pavement evaluation panel experts. The research method for the development of NHPCI (National Highways Pavement Condition Index) involved selection of the sample size and research subject area of pavement. Then, an automated road analyzer for the investigation of pavement condition was used to measure the pavement condition quantitatively. Afterwards, ten panel experts qualitatively evaluated the measurement for a multiple regression analysis. Moreover, the threshold value for pavement resurfacing was set at 50% of the value recommended by the panel based on the rehabilitation strategies required by the pavement evaluation card and the result of influential factors for the selection of the rehabilitation strategy. The study resulted in R^2 value of 0.78 for the NHPCI model equation developed in this study, and sensitivity analysis revealed that roughness (IRI) and crack percent were sensitive. Finally, this study recommends average rut depth value of 11mm, crack percent of 20% as the threshold values for pavement resurfacing (overlay), and average rut depth value of 12mm as the threshold value for pavement mill-resurfacing (inlay).

並列關鍵字

Box-Cox transformation ； Pavement condition index ； Resurfacing ； Sensitivity analysis ； Threshold value