1. Professor, School of Highway Engineering, Changsha Univ. of Science and Technology, Chiling Road 45, Changsha, Hunan, P.R. China, 410076; and, Pavement Analysis Supervisor, Texas Dept. of Transportation, 4203 Bull Creek #39, Austin, TX 78731.
2. Associate Professor, Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji Univ., Shanghai 200092, China.
3. Professor, Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji Univ., Shanghai 200092, China.