AGR
| Alabama and Gulf Coast | 1 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 1 |
BR
| Buffalo and Pittsburgh | 1 |
CN
| Canadian National Railways | 2 |
CNA
| Canadian National Railways | 4 |
CP
| Canadian Pacific Railway | 3 |
CSX
| CSX Railroad | 23 |
EEC
| East Erie Commercial Railroad | 1 |
FCRD
| First Coast Railway | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 1 |
HS
| H and S Railroad Company | 4 |
IC
| Illinois Central | 2 |
KCS
| Kansas City Southern | 9 |
MQT
| Marquette Rail | 2 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 2 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 16 |
POHC
| Pittsburgh & Ohio Central | 1 |
SBD
| Seaboard System | 1 |
SLGG
| Progress Rail Services Corporation | 1 |
SOU
| Southern | 34 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 1 |
WCCL
| Wisconsin Central | 4 |
WLO
| Waterloo Railway Company (Illinois Central) | 9 |