ADMX
| ADM Transportation Company | 2 |
BN
| Burlington Northern | 10 |
CNW
| Chicago & Northwestern | 1 |
CP
| Canadian Pacific Railway | 3 |
CR
| Conrail | 3 |
EJE
| Elgin Joliet and Eastern | 2 |
FGWX
| Federal Grain Inspection Service (USDA) (Scale Test Cars) | 9 |
ICG
| Illinois Central Gulf | 1 |
LN
| Louisville & Nashville | 1 |
MP
| Missouri Pacific | 1 |
NS
| Norfolk Southern | 2 |
NW
| Norfolk & Western | 3 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
UP
| Union Pacific Railroad Company | 3 |
WC
| Wisconsin Central | 2 |
WDAX
| Washington Department of Agriculture | 1 |