1. Department of Civil and Environmental Engineering, University of Nebraska-Lincoln, 2200 Vine St, Suite 262, Lincoln, NE 68583, USA
2. Department of Management Science, University of South Carolina, 1014 Greene St, Columbia, SC 29208, USA
3. Department of Civil and Environmental Engineering, University of South Carolina, 300 Main St, Columbia, SC 29208, USA
4. South Carolina Department of Transportation, 955 Park St, Columbia, SC 29208, USA