- A&R line Railroad (1)
- Arkansas & Missouri Railroad (14)
- Atlantic Coast Line Railroad (3)
- BNSF Railway (1)
- Baltimore and Ohio Railroad (10)
- Big Four Railroad (5)
- Blue Ridge Scenic Railway (1)
- Burlington Northern Santa Fe Railway (84)
- CSX Transportation (62)
- Cairo & Vincennes Railroad (5)
- Canadian National Railroad (16)
- Canadian National Railway (15)
- Canadian Pacific Railroad (4)
- Central Oregon and Pacific Railroad (8)
- Central Railroad of Indianapolis (3)
- Central of Georgia Railway (1)
- Charlotte Harbor & Northern Railway (1)
- Chesapeake & Ohio Railway (1)
- Chesapeake Western Railway (1)
- Chesepeake & Ohio Railroad (2)
- Chicago & Alton Railroad (1)
- Chicago & Eastern Illinois Railroad (1)
- Chicago, Burlington & Quincy Railroad (2)
- Chicago, Milwaukee, St. Paul & Pacific Railroad (8)
- Chicago, Rock Island & Pacific Railroad (30)
- Cincinnati Southern Railway (4)
- Clinchfield (1)
- Cloverleaf Railroad (Toledo, St. Louis, and Western) (1)
- Colorado Midland Railroad (5)
- Colt Railroad (2)
- Columbus & Greenville Railway (3)
- Conrail (13)
- Dakota, Minnesota & Eastern Railroad (2)
- Dakota, Minnesota, and Eastern Railroad (1)
- Eastern Kentucky Railroad (2)
- Elizabethtown, Lexington and Big Sandy Railroad (3)
- Erie Lackawanna Railroad (2)
- Evansville Western Railroad (2)
- Florida East Coast Railway (4)
- Georgia Northeastern Railroad (1)
- Great Northern Railway (2)
- Great Smoky Mountains Railroad (2)
- Illinois Central Railroad (42)
- Illinois Terminal Railroad (15)
- Indiana Railroad (10)
- Indiana Union Traction (1)
- Kansas City Southern Railway (28)
- Kansas City Terminal Railway (2)
- Kansas City, Memphis and Birmingham Railroad (1)
- Kokomo Street Railways (1)
- L & N Railroad (4)
- Lake Erie and Western Railroad (3)
- Louisville and Nashville Railroad (5)
- McCloud River Railroad (1)
- Midland Valley Railroad (4)
- Mississippi Delta Railroad (1)
- Missouri & North Arkansas Railroad (1)
- Missouri Pacific Railroad (22)
- Missouri and North Arkansas Railway (15)
- Missouri-Kansas-Texas Railroad (6)
- Monon Railroad (4)
- Nashville, Chattanooga & St. Louis Railroad (2)
- Nickel Plate Road Railroad (4)
- Norfolk Southern Railway (85)
- Norfolk and Western Railroad (2)
- Norfolk and Western Railway (2)
- North Carolina Railroad Co. (1)
- Northeast Corridor (9)
- Northwestern Pacific Railroad (7)
- Old Atlantic Coast Line Railroad (1)
- Old Baltimore and Ohio Railroad (1)
- Old Louisville and Nashville Railroad (1)
- Oregon Trunk Railway (4)
- Panhandle Railroad (5)
- Penn Central (1)
- Penn Central Railroad (12)
- Peoria and Eastern Railroad (3)
- Pittsburgh and Lake Erie Railroad (1)
- Portland and Western Railroad (2)
- Sedalia, Warsaw & Southwestern Railroad (2)
- Seminole Gulf Railway (1)
- Soo Line Railroad (5)
- Southern Railway (2)
- St. Louis & San Francisco Railroad (26)
- St. Louis, Iron Mountain & Southern Railroad (8)
- Terminal Railroad Association of St. Louis (2)
- Texas & Pacific Railroad (3)
- Toledo Peoria and Western Railroad (3)
- Toledo St. Louis and Western Cloverleaf Railroad (1)
- US Army Railroad (2)
- US Rail Corporation (1)
- Union Pacific Railroad (145)
- Vandalia Railroad (2)
- Winamac Southern Railroad (4)
- Winamac Southern Railway (1)
- Wisconsin Central Ltd. (2)
- Yazoo & Mississippi Valley Railroad (1)