The long-term pavement program (LTPP) database contains surface profile data for pavement sections throughout the United States that is used to compute International Roughness Index (IRI). Byrum previously used Wisconsin LTPP section profiles to analyze curvature in concrete pavement slabs. However, the difficulty with analyzing raw field profiles is the level of noise and frequency of inconsistencies within these data sets. To remedy this problem, an automated pavement analysis method was developed to smooth the real-field profiles and allow for more accurate and consistent analysis of pavement sections or slabs. This method is based on the empirical mode decomposition (EMD) process contained within the Hilbert-Huang Transform (HHT). Past analysis of road surface profiles using the HHT is limited. Adu-Gyamfi et al. used the empirical mode decomposition for pavement surface analysis, and Attoh-Okine et al. also used it to analyze two flexible pavement profiles.