BN
| Burlington Northern | 2 |
CSX
| CSX Railroad | 4 |
GANO
| Georgia Northern Railway Company | 1 |
GEGX
| GE Gas Turbine | 1 |
KRL
| Kasgro Rail Lines | 1 |
MRL
| Montana Rail Link | 1 |
NS
| Norfolk Southern | 1 |
PW
| Providence and Worcester | 3 |
SBVR
| South Branch Valley Rail Road | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SOU
| Southern | 5 |