AGR
| Alabama and Gulf Coast | 1 |
BN
| Burlington Northern | 1 |
CNW
| Chicago & Northwestern | 2 |
CP
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 7 |
IC
| Illinois Central | 1 |
MRL
| Montana Rail Link | 1 |
MSDR
| Knoxville & Holston River Railroad | 1 |
NOKL
| Northwestern Oklahoma | 2 |
ONT
| Ontario Northland Railway | 1 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 2 |
WLO
| Waterloo Railway Company (Illinois Central) | 2 |