1. Professor, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, Madison, WI (corresponding author).
2. Research Intern, Center for Freight and Infrastructure Research and Education (CFIRE), Univ. of Wisconsin-Madison, Madison, WI.
3. Research Assistant, Center for Freight and Infrastructure Research and Education (CFIRE), Univ. of Wisconsin-Madison, Madison, WI.