AMTK
| Amtrak | 7 |
BN
| Burlington Northern | 2 |
CBQ
| Chicago Burlington & Quincy | 1 |
CR
| Conrail | 1 |
CRIP
| Chicago Rock Island & Pacific | 3 |
DRGW
| Denver & Rio Grande Western | 21 |
GMO
| Gulf Mobile & Ohio | 1 |
GN
| Great Northern | 2 |
ICG
| Illinois Central Gulf | 1 |
IT
| IT | 1 |
MILW
| Milwaukee Road | 6 |
SP
| Southern Pacific | 1 |
TN
| Texas and Northern Railway Company | 1 |
WC
| Wisconsin Central | 1 |