1. Assistant Professor, Dept. of Civil Engineering and Texas Transportation Institute, Texas A&M Univ., 3135 TAMU College Station, TX 77843-3135. E-mail: emasad@civil.tamu.edu
2. Assistant Professor, Dept. of Civil and Costal Engineering, Univ. of Florida, Gainesville, FL 32611. E-mail: bbirg@ce.ulf.edu
3. Graduate Research Assistant, Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3135. E-mail: aslam@tamu.edu
4. Manager, Southeastern Superpave Center, National Center for Asphalt Technology, 277 Technology Pkwy, Auburn, AL 36830. E-mail: coolela@eng.auburn.edu