BNSF
| BNSF Railway | 6 |
CGW
| Chicago Great Western | 2 |
CN
| Canadian National Railways | 41 |
CNW
| Chicago & Northwestern | 46 |
CP
| Canadian Pacific Railway | 185 |
CSX
| CSX Railroad | 3 |
CWRX
| CWR TRANSPORTATION CO. | 9 |
EJE
| Elgin Joliet and Eastern | 1 |
GREX
| Georgetown Rail Equipment Company | 38 |
HZGX
| Herzog Contracting Corporation | 18 |
LMIX
| Loram Maintenance of Way Inc. | 34 |
MCRY
| MCRY | 3 |
METX
| METRA | 4 |
MILW
| Milwaukee Road | 5 |
MP
| Missouri Pacific | 11 |
NS
| Norfolk Southern | 16 |
RELA
| RELA | 1 |
RJCC
| R.J. Corman Railroad/Kentucky Lines | 4 |
RMCX
| Reynolds Metals Company | 2 |
RWCX
| RWC Incorporated | 39 |
SBC
| Ferrocarril Sonora Baja California | 1 |
SOO
| Soo Line | 53 |
SP
| Southern Pacific | 1 |
SPMW
| Southern Pacific Maintenance of Way | 5 |
SPSX
| Progress Rail Services Corp | 1 |
UP
| Union Pacific Railroad Company | 95 |
WC
| Wisconsin Central | 14 |
WSOR
| Wisconsin & Southern | 42 |
WSOX
| First Union Rail | 1 |