United States Department of Transportation
i
Validation of pavement performance curves for the mechanistic-empirical pavement design guide.
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2009-02-01
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[PDF-1.68 MB]
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-HIGHWAY/ROAD TRANSPORTATION-Design;
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Abstract:The objective of this research is to determine whether the nationally calibrated performance models used in the Mechanistic-Empirical
Pavement Design Guide (MEPDG) provide a reasonable prediction of actual field performance, and if the desired accuracy or
correspondence exists between predicted and monitored performance for Iowa conditions. A comprehensive literature review was
conducted to identify the MEPDG input parameters and the MEPDG verification/calibration process. Sensitivities of MEPDG input
parameters to predictions were studied using different versions of the MEPDG software. Based on literature review and sensitivity
analysis, a detailed verification procedure was developed. A total of sixteen different types of pavement sections across Iowa, not used
for national calibration in NCHRP 1-47A, were selected. A database of MEPDG inputs and the actual pavement performance measures
for the selected pavement sites were prepared for verification. The accuracy of the MEPDG performance models for Iowa conditions
was statistically evaluated. The verification testing showed promising results in terms of MEPDG’s performance prediction accuracy for
Iowa conditions. Recalibrating the MEPDG performance models for Iowa conditions is recommended to improve the accuracy of
predictions.
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