1. Graduate Research Assistant, Rail Transportation and Engineering Center (RailTEC), Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801. ORCID: .
2. Principal Railway Research Engineer, Rail Transportation and Engineering Center (RailTEC), Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801 (corresponding author). ORCID: .