ATW
| Atlantic and Western | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 1 |
FBOX
| TTX Company | 1 |
GTRA
| Golden Triangle Railroad | 1 |
IBT
| International Bridge and Terminal Company | 3 |
KCS
| Kansas City Southern | 3 |
NS
| Norfolk Southern | 5 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 1 |
SRY
| Southern Railway of British Columbia Lim | 1 |
TBOX
| TTX Company | 1 |