1. Graduate Research Assistant, Rail Transportation and Engineering Center, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana, IL 61801; Brazil Scientific Mobility Program Student, CAPES Foundation, Ministry of Education of Brazil, Brasilia DF, 70040-020, Brazil (corresponding author).
2. Senior Research Engineer, Rail Transportation and Engineering Center, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana, IL 61801.
3. Research Scientist and Senior Lecturer, Rail Transportation and Engineering Center, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana, IL 61801.
4. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana, IL 61801.