CSX
| CSX Railroad | 2 |
GTW
| Grand Trunk Western | 2 |
HPJX
| Helm-Pacific Leasing | 1 |
HS
| H and S Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 2 |
IC
| Illinois Central | 1 |
MP
| Missouri Pacific | 2 |
NADX
| General Electric Rail Services | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NYC
| New York Central | 2 |
SP
| Southern Pacific | 1 |