1. Founder Professor of Engineering, Illinois Center for Transportation; and, Director, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., MC-250, Urbana, IL 61801.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249.
3. Project Engineer, Nichols Consulting Engineers, 501 Canal Boulevard, Suite I, Richmond, CA 94804.