1. Professor, School of Highway Engineering, Changsha Univ. of Science and Technology. Chiling Road 45#, Changsha, Hunan, P.R. China, 410076; and, Pavement Engineering Supervisor, Texas Dept. of Transportation, 4203 Bull Creek #39, Austin, TX 78731. E-mail: dchen@dot.state.tx.us
2. Program Manager, Texas Transportation Institute, 501 CE/TTI Building, Texas A&M Univ., College Station, TX 77843. E-mail: t-scullion@tamu.edu