AGR
| Alabama and Gulf Coast | 1 |
AM
| Arkansas & Missouri | 1 |
ATW
| Atlantic and Western | 2 |
CIRR
| Chattahoochee Industrial Railroad | 1 |
CPAA
| Canadian Pacific Railway | 2 |
FSRR
| FerroSur | 5 |
FXE
| Ferromex | 1 |
HS
| H and S Railroad Company | 1 |
MB
| Meridian & Bigbee | 3 |
RBOX
| Railbox Company | 116 |