1. Professor, College of Civil Engineering, Nanjing Forestry Univ., Nanjing 210037, China.
2. Professor, Dept. of Civil, Architectural, and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO 65409-0030 (corresponding author).
3. Associate Professor, Dept. of Civil, Architectural, and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO 65409-0030.
4. Assistant Professor, School of Highway, Chang’an Univ., Xi’an 710064, China.
5. State Pavement Engineer, Alaska Dept. of Transportation & Public Facilities, 5800 E. Tudor Rd., Anchorage, AK 99507.