ABOX
| TTX Company | 1 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
CR
| Conrail | 1 |
DWC
| Canadian National Railways | 1 |
FSRR
| FerroSur | 1 |
HS
| H and S Railroad Company | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
MWCX
| Midwest Railcar Corporation | 1 |
NS
| Norfolk Southern | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 1 |