Illinois Key Professionals

           Anson E. Marston

           Arthur Newell Talbot

           Harold M. Westergaard

           Clifford Older

           Samuel Ellsworth Bradt

           Frank T. Sheets

           B.H. Piepmeier

           Ernst Lieberman - Chief Highway Engineer in 1938 (Biography not available)

           Raymond F. Dawson

           William Phelps Eno