ACY
| Akron, Canton & Youngstown | 1 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
ATW
| Atlantic and Western | 3 |
BAR
| Bangor & Aroostook | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 1 |
BPRR
| Buffalo and Pittsburgh | 1 |
CGR
| CG Railway, Inc | 2 |
CIRR
| Chattahoochee Industrial Railroad | 1 |
CMHX
| CarMath Incorporated | 1 |
CR
| Conrail | 1 |
CRLE
| Coe Rail Incorporated | 1 |
CSX
| CSX Railroad | 2 |
EEC
| East Erie Commercial Railroad | 4 |
FBOX
| TTX Company | 2 |
FP
| Fordyce & Princeton Railroad Company | 1 |
FXE
| Ferromex | 1 |
GMRC
| Green Mountain RR | 3 |
IATR
| Iowa Traction Railroad Company | 1 |
ICG
| Illinois Central Gulf | 1 |
ITLX
| General Electric Rail Services | 1 |
KCS
| Kansas City Southern | 1 |
LVRC
| Lamoille Valley | 2 |
MEC
| Maine Central | 2 |
MILW
| Milwaukee Road | 1 |
MMA
| Montreal, Maine & Atlantic | 3 |
MSDR
| Knoxville & Holston River Railroad | 1 |
NADX
| General Electric Rail Services | 1 |
NS
| Norfolk Southern | 2 |
NW
| Norfolk & Western | 3 |
OAR
| Old Augusta Railroad | 1 |
PICK
| Pickens Railway | 1 |
RBOX
| Railbox Company | 2 |
RDG
| Reading Railroad | 1 |
SBD
| Seaboard System | 4 |
SCL
| Seaboard Coast Line | 4 |
SOU
| Southern | 13 |
SP
| Southern Pacific | 3 |
UP
| Union Pacific Railroad Company | 1 |
WP
| Western Pacific | 2 |