AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
ATW
| Atlantic and Western | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 6 |
CEDX
| G.S.S.&M. Inc, Rail Division | 2 |
CN
| Canadian National Railways | 2 |
CNW
| Chicago & Northwestern | 2 |
CP
| Canadian Pacific Railway | 4 |
CR
| Conrail | 2 |
GSSX
| Gopher State Scrap and Metal | 1 |
IC
| Illinois Central | 1 |
MP
| Missouri Pacific | 2 |
MS
| Michigan Shore Railroad Incorporated | 1 |
NS
| Norfolk Southern | 2 |
SP
| Southern Pacific | 2 |
SPSX
| Progress Rail Services Corp | 2 |
UCRY
| Utah Central | 2 |
WCRC
| Washington Central | 1 |