The National Cooperative Highway Research Program (NCHRP) awarded Dr. Louay Mohammad and Dr. Mostafa Elseifi $500,000 for their proposal titled Field versus Laboratory Volumetrics and Mechanical Properties.  The objectives of this study are (1.) quantify sources and causes of variability in the measurements of volumetric and mechanical properties of dense-graded asphalt mixtures for three types of specimens that may be encountered in QA and mix design activities (laboratory mixed and compacted, plant mixed and laboratory compacted, and plant mixed and field compacted, and (2.) develop a recommended practice for state DOTs to incorporate these results in specifications and criteria for (a) quality assurance; (b) mix design and verification or validation, and (c) structural design and forensic studies.