1. Lead Engineer, National Center for Asphalt Technology, 277 Technology Pkwy, Auburn, AL 36830 (corresponding author).
2. Pavement Systems Evaluation Specialist, Florida Dept. of Transportation, 5007 NE 39th Ave., Gainesville, FL 32609.
3. Professor, School of Architectural Engineering, Korea Univ. of Technology and Education, 307 Gajeon Ri, Byungcheon Myon Chonan Si, Chungnam 330-708, South Korea.