AMTK
| Amtrak | 2 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 2 |
CN
| Canadian National Railways | 8 |
CNW
| Chicago & Northwestern | 1 |
CP
| Canadian Pacific Railway | 3 |
CR
| Conrail | 52 |
CRR
| Clinchfield | 1 |
DMIR
| Duluth Missabe & Iron Range | 4 |
MP
| Missouri Pacific | 3 |
NS
| Norfolk Southern | 5 |
NW
| Norfolk & Western | 3 |
SOU
| Southern | 1 |
SPMW
| Southern Pacific Maintenance of Way | 1 |
UP
| Union Pacific Railroad Company | 1 |