1. Graduate Research Assistant, Center for Sustainable Transportation Infrastructure, Virginia Tech Transportation Institute, Blacksburg, VA 24060 (corresponding author). ORCID: .
2. Research Scientist, Center for Sustainable Transportation Infrastructure, Virginia Tech Transportation Institute, Blacksburg, VA 24060.
3. Director, Center for Sustainable Transportation Infrastructure, Virginia Tech Transportation Institute, Blacksburg, VA 24060.
4. Principal Research Scientist, Virginia Transportation Research Council, 530 Edgemont Rd., Charlottesville, VA 22903.