BN
| Burlington Northern | 1 |
BS
| Birmingham Southern RR | 1 |
GMO
| Gulf Mobile & Ohio | 1 |
ICG
| Illinois Central Gulf | 3 |
LN
| Louisville & Nashville | 6 |
NS
| Norfolk Southern | 2 |
OWTX
| Oneida & Western Transportation | 2 |
SBD
| Seaboard System | 1 |
SCL
| Seaboard Coast Line | 1 |
SOU
| Southern | 5 |
WHOE
| Walking Horse & Eastern | 1 |