ATSF
| Atchison Topeka & Santa Fe | 3 |
BAEX
| Andersons | 17 |
BCIT
| Canadian National Railways | 2 |
BN
| Burlington Northern | 5 |
BNSF
| BNSF Railway | 6 |
CGR
| CG Railway, Inc | 18 |
CNW
| Chicago & Northwestern | 9 |
CR
| Conrail | 2 |
CSX
| CSX Railroad | 151 |
DRGW
| Denver & Rio Grande Western | 18 |
GKLX
| Gold Kist | 1 |
IANR
| Iowa Northern Ry | 3 |
IC
| Illinois Central | 1 |
MNNR
| Minnesota Commercial | 3 |
MP
| Missouri Pacific | 32 |
MRS
| Manufacturers Railway | 13 |
MSRC
| Kansas City Southern | 1 |
NADX
| General Electric Rail Services | 1 |
NP
| Northern Pacific | 1 |
NYC
| New York Central | 10 |
SCL
| Seaboard Coast Line | 1 |
SFLC
| BNSF Railway | 27 |
SLSF
| Saint Louis-San Francisco | 2 |
SOO
| Soo Line | 3 |
SP
| Southern Pacific | 68 |
SSW
| St Louis Southwestern (Cotton Belt) | 39 |
STE
| Stockton Terminal and Eastern RR | 1 |
UP
| Union Pacific Railroad Company | 50 |
USLX
| General Electric Rail Services | 1 |
WP
| Western Pacific | 4 |