BO
| Baltimore & Ohio | 1 |
CNW
| Chicago & Northwestern | 1 |
CSX
| CSX Railroad | 2 |
DRGW
| Denver & Rio Grande Western | 3 |
LM
| Litchfield & Madison | 1 |
LN
| Louisville & Nashville | 2 |
MP
| Missouri Pacific | 1 |
NW
| Norfolk & Western | 1 |
SOU
| Southern | 1 |
SOUT
| SOUT | 1 |
UP
| Union Pacific Railroad Company | 5 |