BN
| Burlington Northern | 3 |
BO
| Baltimore & Ohio | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CNW
| Chicago & Northwestern | 1 |
CRIP
| Chicago Rock Island & Pacific | 1 |
HBTM
| HBTM | 1 |
ICG
| Illinois Central Gulf | 1 |
MILW
| Milwaukee Road | 2 |
PE
| Peoria & Eastern | 1 |
PREX
| Pioneer Rail Equipment | 1 |
SOO
| Soo Line | 1 |
SP
| Southern Pacific | 1 |
UP
| Union Pacific Railroad Company | 3 |