BCOL
| Canadian National Railways | 1 |
BM
| Boston & Maine | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 1 |
CN
| Canadian National Railways | 1 |
CNA
| Canadian National Railways | 1 |
CNIS
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 1 |
CPAA
| Canadian Pacific Railway | 1 |
CR
| Conrail | 4 |
CSX
| CSX Railroad | 1 |
CVC
| Canadian National Railways | 2 |
DRGW
| Denver & Rio Grande Western | 1 |
DVS
| Delta Valley and Southern Railway Compan | 1 |
DWC
| Canadian National Railways | 1 |
EEC
| East Erie Commercial Railroad | 1 |
GTW
| Grand Trunk Western | 1 |
GVSR
| Galveston Railroad L.P. | 1 |
HATX
| Helm Financial Corporation | 1 |
HS
| H and S Railroad Company | 1 |
LVRC
| Lamoille Valley | 1 |
MILW
| Milwaukee Road | 2 |
NS
| Norfolk Southern | 1 |
SLSF
| Saint Louis-San Francisco | 2 |
SOO
| Soo Line | 2 |
SOU
| Southern | 4 |
TBOX
| TTX Company | 2 |
WC
| Wisconsin Central | 1 |
WP
| Western Pacific | 1 |