ABS
| Alabama Southern Railroad | 1 |
APA
| Apache Railway Company | 1 |
ARR
| Alaska Railroad | 1 |
BCOL
| Canadian National Railways | 2 |
BN
| Burlington Northern | 2 |
CN
| Canadian National Railways | 2 |
CNIS
| Canadian National Railways | 1 |
CW
| Colorado and Wyoming | 1 |
DWC
| Canadian National Railways | 1 |
ELS
| Escanaba and Lake Superior Railroad Comp | 5 |
ELSX
| Kentucky May Coal Company Incorporated | 1 |
HKRX
| HKRX | 2 |
IFRX
| Infinity Rail LLC | 1 |
IHB
| Indiana Harbor Belt | 2 |
IHP
| IHP | 1 |
JTSX
| Joseph Transportation Incorporated | 1 |
MILW
| Milwaukee Road | 1 |
MP
| Missouri Pacific | 1 |
MRL
| Montana Rail Link | 1 |
MSPX
| P4 Productions LLC | 1 |
RDRX
| RDRX | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TTPX
| TTX Company - Bulkhead Flats | 12 |
UP
| Union Pacific Railroad Company | 1 |