AM
| Arkansas & Missouri | 3 |
BKTY
| Union Pacific Railroad Company | 2 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 1 |
FXE
| Ferromex | 1 |
GTRA
| Golden Triangle Railroad | 2 |
HS
| H and S Railroad Company | 1 |
KCS
| Kansas City Southern | 1 |
KYLE
| Kyle Railroad | 1 |
MKT
| Missouri-Kansas-Texas | 2 |
MP
| Missouri Pacific | 1 |
NERR
| Nashville and Eastern | 1 |
SOU
| Southern | 1 |
SRN
| Sabine River & Northern | 2 |
TOE
| Texas Oklahoma and Eastern RR Company | 2 |
TSE
| Texas South-Eastern Railroad Company | 2 |