ABS
| Alabama Southern Railroad | 9 |
ATW
| Atlantic and Western | 4 |
BCOL
| Canadian National Railways | 1 |
BNSF
| BNSF Railway | 21 |
BVRY
| Brandywine Valley Railroad Company | 1 |
CN
| Canadian National Railways | 1 |
CS
| Colorado & Southern | 1 |
GAEX
| General American Marks Company | 1 |
IARX
| IARX | 1 |
KCS
| Kansas City Southern | 2 |
LW
| Louisville and Wadley Railway Company | 4 |
MP
| Missouri Pacific | 1 |
MVKX
| Tubular Transport Services | 1 |
NGSX
| NGSX | 1 |
NOKL
| Northwestern Oklahoma | 7 |
NS
| Norfolk Southern | 2 |
POGX
| PIGX | 1 |
SOU
| Southern | 4 |
SP
| Southern Pacific | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 21 |
TTJX
| TTX Company-Bulkhead Flats | 5 |
TTPX
| TTX Company - Bulkhead Flats | 121 |
UMP
| Upper Merion and Plymouth Railroad | 2 |
UP
| Union Pacific Railroad Company | 6 |