1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Massachusetts, Amherst, MA 01003.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Massachusetts, Amherst, MA 01003 (corresponding author). ORCID: .
3. Assistant Administrator for Traffic and Safety, Massachusetts Dept. of Transportation, Highway Div., Boston, MA 02116. ORCID: