1. Professor, School of Highway Engineering, Changsha Univ. of Science and Technology, Chiling Road 45, Changsha, Hunan, P.R. China, 410076; and, Pavement Engineer, Texas Dept. of Transportation, 4203 Bull Creek 39, Austin, TX 78731.
2. Transportation Engineer, Texas Dept. of Transportation, 9500 N. Lake Creek Pkwy, Austin, TX 78717.
3. Principal Geophysicist-Geologist, Environmental Geophysics Associates, 9211 Colony Pond Dr., Ste. 200, Spring, TX 77379.