1. Olson Distinguished Professor of Civil Engineering, Purdue Univ., West Lafayette, IN 47907-1284.
2. Associate Professor of Civil Engineering, Purdue Univ., West Lafayette, IN 47907-1284.
3. Duquesne Light Company Professor of Engineering, Carnegie Mellon Univ., Pittsburgh, PA 15213-3890.
4. Transportation Consultant, New Haven, CT 06515.
5. Professor of Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI 48824-1226.
6. Professor of Civil and Environmental Engineering, Univ. of Central Florida, Orlando, FL 32816-2450.
7. Graduate Research Assistant in Civil Engineering, Purdue Univ., West Lafayette, IN 47907-1284.