United States Department of Transportation
i
Local Calibration of Mechanistic-Empirical Pavement Design Guide in Tennessee
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2016-03-01
[PDF-5.08 MB]
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Edition:Final Report September 2013 – March 2016
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Abstract:The Tennessee Department of Transportation (TDOT) has invested effort and resources to transition from the AASHTO 1993 pavement design guide to the up-to-date AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG). To accomplish this goal, several phases of research activities were conducted. In the first phase, a database for soil resilient modulus was established using representative soil samples in Tennessee. In the second phase, a database of concrete coefficients of thermal expansion (CTE) was generated. In another research project, a database was developed for the dynamic modulus of asphalt mixtures. In the current phase, the most important transfer functions in the MEPDG were locally calibrated according to the unique conditions of Tennessee. These models include the alligator cracking (bottom-up cracks), longitudinal cracking or load related wheel-path fatigue cracking, rutting, and smoothness (IRI) models.
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