1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Nebraska-Lincoln, 262M Prem S. Paul Research Center at Whittier School, 2200 Vine St., Lincoln, NE 68583-0851 (corresponding author). ORCID: .
2. Distinguished Professor and Director, Nebraska Transportation Center, Keith W. Klaasmeyer Chair of Engineering, Univ. of Nebraska-Lincoln, 262D Prem S. Paul Research Center at Whittier School, Lincoln, NE 68583-0851.