1. National Center for Asphalt Technology, 277 Technology Parkway, Auburn, AL 36830, USA
2. Texas A&M Transportation Institute, 3135 TAMU, CE/TTI Bldg. 508B, College Station, TX 77843, USA
3. School of Engineering and Applied Science, Aston University, MB153A, Aston Triangle, Birmingham B4 7ET, UK
4. Zachry Department of Civil Engineering, Texas A&M University, 3136 TAMU, CE/TTI Bldg. 503A, College Station, TX 77843, USA