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145 Acknowledgments The research team thanks the NCHRP project panel for their guidance and patience as the team worked through the research work plan.
146 List of Abbreviations AASHTO, American Association of State Highway and Transportation Officials AC, asphalt concrete AM, analysis method ANN, artificial neural network AV_s, surface asphalt mixture as-constructed air voids, also expressed as %Gmm_s AV_m, mean asphalt layer mixture as-constructed air voids, also expressed as %Gmm_m BC, asphalt binder content BSB, base and subbase E*, asphalt mixture dynamic modulus ESAL, equivalent single axle load FHWA, Federal Highway Administration FI, annual freezing index FtC, fatigue cracking Gmm, computed value of mixture maximum specific gravity Gr, gradation of asphalt surface lift HPMS, Highway Performance Monitoring System IRI, international roughness index LTPP, Long-Term Pavement Performance Program Mr, resilient modulus NCHRP, National Cooperative Highway Research Program Prec, total annual precipitation SG, subgrade SN, pavement structural number Temp, average annual temperature Th, layer thickness TrC, thermal cracking