1. Graduate Student, Dept. of Civil, Environmental, and Sustainable Engineering, School of Sustainable Engineering and the Built Environment, Arizona State Univ., Engineering Center, G-Wing Room ECG252, P.O. Box 5306, Tempe, AZ 85287-5306.
2. Graduate Student, Dept. of Civil, Environmental and Sustainable Engineering, School of Sustainable Engineering and the Built Environment, Arizona State Univ., Engineering Center, G-Wing Room ECG252, P.O. Box 5306, Tempe, AZ 85287-5306.
3. Assistant Professor, Dept. of Civil, Environmental and Sustainable Engineering, School of Sustainable Engineering and the Built Environment, Arizona State Univ., Engineering Center, G-Wing Room ECG252, P.O. Box 5306, Tempe, AZ 85287-5306 (corresponding author).
4. Director, Traffic Safety Center, Univ. of California, Berkeley, 2614 Dwight Way #7374, Berkeley, CA 94720-7374.