AOK
| Arkansas-Oklahoma Railroad | 8 |
ATW
| Atlantic and Western | 2 |
BCOL
| Canadian National Railways | 6 |
BNSF
| BNSF Railway | 14 |
CBRY
| Copper Basin Railway | 1 |
CLC
| Columbia and Cowlitz Railway Company | 3 |
CN
| Canadian National Railways | 7 |
CNA
| Canadian National Railways | 1 |
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 | 5 |
HPTX
| HAMPTON CAPITAL LLC | 2 |
IC
| Illinois Central | 3 |
ICG
| Illinois Central Gulf | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
MMA
| Montreal, Maine & Atlantic | 2 |
MSRC
| Kansas City Southern | 1 |
NOKL
| Northwestern Oklahoma | 10 |
NS
| Norfolk Southern | 11 |
SGLR
| Seminole Gulf | 1 |
SMW
| St Marys Railway West LLC | 1 |
SOO
| Soo Line | 6 |
SRY
| Southern Railway of British Columbia Lim | 3 |
TR
| Tomahawk Railway L.P. | 10 |
TTZX
| TTX Company-Centerbeam Flats | 34 |
UCRY
| Utah Central | 1 |
UP
| Union Pacific Railroad Company | 2 |
WC
| Wisconsin Central | 2 |
WCRC
| Washington Central | 8 |