CNA
| Canadian National Railways | 1 |
CR
| Conrail | 3 |
CSX
| CSX Railroad | 14 |
GTW
| Grand Trunk Western | 2 |
ICG
| Illinois Central Gulf | 1 |
MP
| Missouri Pacific | 14 |
NS
| Norfolk Southern | 36 |
SOU
| Southern | 14 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
UP
| Union Pacific Railroad Company | 2 |
WP
| Western Pacific | 3 |