CN
| Canadian National Railways | 1 |
CO
| Chesapeake & Ohio | 7 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 1 |
FEC
| Florida East Coast | 14 |
HZGX
| Herzog Contracting Corporation | 9 |
KCS
| Kansas City Southern | 3 |
NERX
| Transportation Management Services Incorporated | 1 |
NS
| Norfolk Southern | 5 |
SBD
| Seaboard System | 1 |
SI
| Union Pacific Railroad Company (Spokane International) | 4 |
UP
| Union Pacific Railroad Company | 3 |