Coleman Froehlke Education 2023 BS (Civil Engineering) University of Illinois Urbana-Champaign (Geotechnical primary focus, structural engineering secondary focus) 2025 MS (Civil Engineering) University of Illinois Urbana-Champaign Previous RailTEC Associations Master's Student RailTEC Publications View: Sorted By Type | (Currently viewing) Sorted By Year 2025 Froehlke, C.R., M.S. Dersch, J.R. Edwards, A. de O. Lima and E. Tutumluer. 2025. Effect of sub-freezing temperatures on ballast strength: A laboratory study. Transportation Geotechnics. 52 (May 2025) doi:10.1016/j.trgeo.2025.101551.