Defunct railroads
- Alton and Southern Railway (AS)
- Atchison, Topeka and Santa Fe Railway (ATSF)
- Baltimore and Ohio Chicago Terminal Railroad (B&OCT)
- Baltimore and Ohio Railroad (B&O)
- Burlington Northern Railroad (BN)
- Chesapeake and Ohio Railway (C&O)
- Chessie System
- Chicago and Alton Railroad
- Chicago and Eastern Illinois Railroad (C&EI)
- Chicago and Illinois Midland (C&IM)
- Chicago and Northwestern Railway (CNW)
- Chicago and Western Indiana Railroad (C&WI)
- Chicago, Burlington and Quincy Railroad (CB&Q)
- Chicago Central and Pacific Railroad (CC)
- Chicago Great Western Railway (CGW)
- Chicago, Madison and Northern (CMN)
- Chicago North Shore and Milwaukee Railroad (North Shore Line)
- Chicago, Rock Island and Pacific Railroad (CRIP, Rock Island)
- Chicago, St. Paul, Minneapolis and Omaha Railway (Omaha Road, or CMO)
- Cleveland, Cincinnati, Chicago and St. Louis Railroad (Big Four Railroad)
- Cotton Belt Railroad (SSW)
- Galena and Chicago Union Railroad
- Grand Trunk Western Railroad (GTW)
- Great Northern Railway (GN)
- I&M Rail Link (IMRL)
- Illinois Central Gulf Railroad (ICG)
- Illinois Central Railroad (IC)
- Illinois Terminal Railway (ITC)
- Kankakee, Beaverville and Southern Railroad (KBS)
- Lake Erie and Western Railroad
- Lake Shore and Michigan Southern Railroad (LSMS)
- Milwaukee Road (MILW)
- Missouri Pacific Railroad (MP)
- Monon (MON)
- New York Central Railroad (NYC)
- New York, Chicago and St. Louis Railroad (Nickel Plate Road)
- Norfolk and Western Railway (N&W)
- Penn Central (PC)
- Pennsylvania Railroad (PRR)
- Peoria and Pekin Union Railway (P&PU)
- Pere Marquette Railroad (PM)
- Soo Line (SOO)
- Southern Pacific Railroad (SP)
- Wabash, St. Louis and Pacific Railroad (WAB)
- Wisconsin Central (WC)
