1. Railroad Engineering Program, University of Illinois at Urbana–Champaign, 1201 Newmark Civil Engineering Laboratory, 205 North Mathews Avenue, Urbana, IL 61801
2. HDR Engineering, Inc., 512 Main Street, Suite 600, Fort Worth, TX 76102
3. Hazardous Materials, Burlington Northern Santa Fe Railway, 2600 Lou Menk Drive, Fort Worth, TX 76131