AOK
| Arkansas-Oklahoma Railroad | 2 |
ATW
| Atlantic and Western | 3 |
BCOL
| Canadian National Railways | 1 |
BNSF
| BNSF Railway | 3 |
CN
| Canadian National Railways | 1 |
GAEX
| General American Marks Company | 4 |
GTW
| Grand Trunk Western | 1 |
HLSC
| Hampton Railway Incorporated | 2 |
IC
| Illinois Central | 1 |
MEC
| Maine Central | 1 |
NDYX
| First Union Rail | 1 |
NOKL
| Northwestern Oklahoma | 2 |
NS
| Norfolk Southern | 6 |
SERA
| Sierra Northern Railway | 1 |
SMW
| St Marys Railway West LLC | 2 |
SOO
| Soo Line | 3 |
TTZX
| TTX Company-Centerbeam Flats | 8 |
UP
| Union Pacific Railroad Company | 5 |
WC
| Wisconsin Central | 2 |
WCRC
| Washington Central | 3 |
WRWK
| Providence & Worchester Railroad | 1 |