Evaluation and Analysis of LTPP Pavement Layer Thickness Data
Primary Topic: Pavement Maintenance
Description: This report documents a comprehensive review and evaluation of the Long Term Pavement Performance (LTPP) pavement layer thickness data. Pavement layer thickness data are very important for many types of analyses, including backcalculation of pavement moduli, mechanistic analysis of pavement structures, and performance modeling. The accuracy of layer thickness data has a great impact on the outcome of practically all analyses of performance. The report contains an assessment of the LTPP layer thickness data and recommendations for resolution of anomalous data. Results of the statistical analyses documented in this report provide insights into the characteristics of within-section layer thickness variability. The results of the comparison between as-designed and as-constructed layer thickness data provide useful estimates of the expected construction-related variability. These results can serve as a very important input to pavement engineering applications involving the reliability of pavement design and also for quality assurance construction specifications.
FHWA Publication Number: FHWA-RD-03-041
Publication Year: 2002