AOK
| Arkansas-Oklahoma Railroad | 7 |
ATW
| Atlantic and Western | 2 |
BCOL
| Canadian National Railways | 5 |
BNSF
| BNSF Railway | 8 |
CLC
| Columbia and Cowlitz Railway Company | 3 |
CN
| Canadian National Railways | 6 |
CORP
| Central Oregon & Pacific | 1 |
CRLE
| Coe Rail Incorporated | 1 |
DWC
| Canadian National Railways | 4 |
FURX
| First Union Rail | 1 |
GNRR
| Georgia Northeastern | 1 |
GTW
| Grand Trunk Western | 3 |
HLSC
| Hampton Railway Incorporated | 1 |
IC
| Illinois Central | 3 |
LW
| Louisville and Wadley Railway Company | 1 |
MMA
| Montreal, Maine & Atlantic | 1 |
NOKL
| Northwestern Oklahoma | 11 |
NS
| Norfolk Southern | 2 |
SGLR
| Seminole Gulf | 1 |
SMW
| St Marys Railway West LLC | 1 |
SOO
| Soo Line | 6 |
TR
| Tomahawk Railway L.P. | 11 |
TTZX
| TTX Company-Centerbeam Flats | 32 |
UP
| Union Pacific Railroad Company | 2 |
WC
| Wisconsin Central | 1 |
WCRC
| Washington Central | 2 |