ARR
| Alaska Railroad | 2 |
BNSF
| BNSF Railway | 2 |
CVC
| Canadian National Railways | 1 |
DH
| Delaware & Hudson | 1 |
GMRC
| Green Mountain RR | 4 |
GVSR
| Galveston Railroad L.P. | 1 |
NS
| Norfolk Southern | 4 |
PRR
| Pennsylvania Railroad | 1 |
RUT
| Vermont Railway Incorporated | 1 |
SOU
| Southern | 1 |
TBOX
| TTX Company | 1 |
UP
| Union Pacific Railroad Company | 1 |
VTR
| Vermont Railway | 1 |
WCCL
| Wisconsin Central | 1 |