1. Assistant Professor, Dept. of Civil and Environmental Engineering, Washington State Univ., Pullman, WA 99164.
2. Associate Professor, Program in Statistics, Washington State Univ., Pullman, WA 99164.
3. Assistant Professor, Program in Statistics, Washington State Univ., Pullman, WA 99164.
4. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Washington State Univ., Pullman, WA 99164.
5. Material Scientist, Turner-Fairbank Highway Research Center, Federal Highway Administration, 6300 Georgetown Pike, McLean, VA 22101.