ABOX
| TTX Company | 10 |
ATW
| Atlantic and Western | 45 |
BNSF
| BNSF Railway | 51 |
CBQ
| Chicago Burlington & Quincy | 1 |
CNW
| Chicago & Northwestern | 6 |
FBOX
| TTX Company | 14 |
RBOX
| Railbox Company | 23 |
SRY
| Southern Railway of British Columbia Lim | 120 |
TBOX
| TTX Company | 15 |
UP
| Union Pacific Railroad Company | 4 |
WP
| Western Pacific | 1 |