AC
| Algoma Central | 1 |
ARR
| Alaska Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 6 |
ATW
| Atlantic and Western | 1 |
BAR
| Bangor & Aroostook | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 3 |
CASX
| CASX | 1 |
CHTT
| Chicago Heights Terminal Transfer | 2 |
CN
| Canadian National Railways | 1 |
CS
| Colorado & Southern | 1 |
CSX
| CSX Railroad | 2 |
DH
| Delaware & Hudson | 1 |
DJTX
| Joseph Transportation Incorporated | 1 |
FCP
| Ferrocarril Del Pacifico | 5 |
FURX
| First Union Rail | 1 |
FXE
| Ferromex | 1 |
GN
| Great Northern | 1 |
GNTX
| TTX Company | 5 |
GONX
| Railgon Company | 1 |
HKRX
| HKRX | 2 |
HZGX
| Herzog Contracting Corporation | 3 |
LT
| Lake Terminal Railroad Company | 4 |
LV
| Lehigh Valley | 1 |
MAA
| Magma Arizona Railroad Company | 2 |
MEC
| Maine Central | 1 |
MILW
| Milwaukee Road | 6 |
MRL
| Montana Rail Link | 1 |
NDEM
| NDEM | 2 |
NP
| Northern Pacific | 2 |
NW
| Norfolk & Western | 3 |
PLE
| Pittsburgh & Lake Erie | 2 |
SMPX
| Commercial Metal Company | 1 |
SOO
| Soo Line | 2 |
SP
| Southern Pacific | 6 |
SSTX
| Schnitzer Steel | 1 |
SULX
| Sultran Limited | 1 |
TFM
| Kansas City Southern De Mexico | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 1 |
UFIX
| NRG Energy | 1 |
UP
| Union Pacific Railroad Company | 3 |
USA
| USA | 1 |
USGX
| Union Sugar Co. | 3 |
WM
| Western Maryland | 1 |
WPRR
| Willamette and Pacific | 2 |