AA
| Ann Arbor | 1 |
CNA
| Canadian National Railways | 2 |
COER
| Crab Orchard & Egyptian | 1 |
CSX
| CSX Railroad | 1 |
GTW
| Grand Trunk Western | 1 |
ICG
| Illinois Central Gulf | 2 |
KCS
| Kansas City Southern | 1 |
NKP
| Nickel Plate | 1 |
NYC
| New York Central | 1 |
SOU
| Southern | 1 |
TBOX
| TTX Company | 4 |
WP
| Western Pacific | 1 |