1. Professor, Dept. of Civil Engineering, Univ. of Nevada, Reno, NV 89557.
2. Graduate Research Assistant, Dept. of Civil Engineering, Univ. of Nevada, Reno, NV 89557.
3. Research Engineer, South Dakota DOT, Office of Research, 700 E. Broadway Ave., Pierre, SD 57510.
4. Director of Research, South Dakota DOT, Office of Research, 700 E. Broadway Ave., Pierre, SD 57510.