AGR
| Alabama and Gulf Coast | 1 |
BKTY
| Union Pacific Railroad Company | 1 |
LRS
| Laurinburg and Southern | 1 |
MB
| Meridian & Bigbee | 1 |
MEC
| Maine Central | 4 |
SMW
| St Marys Railway West LLC | 1 |
SNC
| Saratoga & North Creek Railway | 1 |
SOU
| Southern | 1 |
SRN
| Sabine River & Northern | 1 |