AOK
| Arkansas-Oklahoma Railroad | 4 |
ATW
| Atlantic and Western | 1 |
BCOL
| Canadian National Railways | 1 |
BNSF
| BNSF Railway | 1 |
CN
| Canadian National Railways | 4 |
DWC
| Canadian National Railways | 5 |
FURX
| First Union Rail | 1 |
GAEX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 1 |
GTW
| Grand Trunk Western | 1 |
LRS
| Laurinburg and Southern | 1 |
NDYX
| First Union Rail | 1 |
NS
| Norfolk Southern | 7 |
ONT
| Ontario Northland Railway | 1 |
SMW
| St Marys Railway West LLC | 3 |
SOO
| Soo Line | 3 |
TR
| Tomahawk Railway L.P. | 1 |
TTZX
| TTX Company-Centerbeam Flats | 9 |
UCRY
| Utah Central | 1 |
WC
| Wisconsin Central | 3 |