AOK
| Arkansas-Oklahoma Railroad | 10 |
CNA
| Canadian National Railways | 2 |
CR
| Conrail | 2 |
CSX
| CSX Railroad | 1 |
HS
| H and S Railroad Company | 1 |
KCS
| Kansas City Southern | 4 |
KCSM
| Kansas City Southern De Mexico | 1 |
LW
| Louisville and Wadley Railway Company | 2 |
MP
| Missouri Pacific | 4 |
SSW
| St Louis Southwestern (Cotton Belt) | 3 |
UP
| Union Pacific Railroad Company | 4 |
WRWK
| Providence & Worchester Railroad | 3 |