1. Ph.D. Candidate, National Center for Asphalt Technology, Auburn Univ., Auburn, AL 36830 (corresponding author).
2. Associate Research Professor, National Center for Asphalt Technology, Auburn Univ., Auburn, AL 36830.
3. Assistant Research Engineer and Associate Research Professor, National Center for Asphalt Technology, Auburn Univ., Auburn, AL 36830.
4. Assistant State Materials and Tests Engineer, Alabama Dept. of Transportation, 3700 Fairground Rd., Montgomery, AL 36110.