1. Research Engineer, NASA Glenn Research Center, 21000 Brookpark Rd., Cleveland, OH 44135 (corresponding author).
2. Consulting Engineer, Freiligrathstrasse 6, 63071 Offenbach, Germany.
3. Research Fellow, FHwA/NHTSA National Crash Analysis Center, George Washington Univ., 20101 Academic Way, Ashburn, VA 20147.
4. Associate Research Professor of Engineering and Applied ScienceFHwA/NHTSA National Crash Analysis Center, George Washington Univ., 20101 Academic Way, Ashburn, VA 20147.