BN
| Burlington Northern | 30 |
BNSF
| BNSF Railway | 7 |
CNW
| Chicago & Northwestern | 3 |
CP
| Canadian Pacific Railway | 5 |
CS
| Colorado & Southern | 3 |
IATR
| Iowa Traction Railroad Company | 1 |
LI
| Long Island Rail Road Company | 1 |
MILW
| Milwaukee Road | 1 |
MSTL
| Minneapolis & St Louis | 2 |
NP
| Northern Pacific | 18 |
RRVW
| Red River Valley and Western Railroad | 1 |
SOO
| Soo Line | 8 |
UP
| Union Pacific Railroad Company | 10 |