1. Associate Professor, Univ. of Minnesota Duluth, Duluth, MN 55812. ORCID: .
2. Associate Professor, Northern Arizona Univ., Flagstaff, AZ 86011 (corresponding author). ORCID: .
3. Associate Professor, Univ. of Minnesota Twin Cities, Minneapolis, MN 55455-0213. ORCID: .
4. Graduate Engineer, Minnesota Dept. of Transportation, St. Paul, MN 55155-1800. ORCID: .