ACL
| Atlantic Coast Line | 1 |
BCK
| Buffalo Creek Flour | 1 |
BNSF
| BNSF Railway | 1 |
BO
| Baltimore & Ohio | 1 |
HS
| H and S Railroad Company | 1 |
MEC
| Maine Central | 1 |
MSE
| Mississippi Export Railroad Company | 1 |
PGR
| Progressive Rail, Inc | 1 |
RBOX
| Railbox Company | 1 |
SCL
| Seaboard Coast Line | 1 |
SOU
| Southern | 2 |
SRN
| Sabine River & Northern | 2 |