AMTK
| Amtrak | 12 |
BDRV
| Belvidere & Delaware Railroad | 2 |
BKTY
| Union Pacific Railroad Company | 1 |
CBQ
| Chicago Burlington & Quincy | 2 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 4 |
CR
| Conrail | 9 |
CRTA
| Cleveland Rapid Transit | 1 |
CSX
| CSX Railroad | 6 |
EBT
| East Broad Top | 1 |
EL
| Erie Lackawanna | 8 |
GTW
| Grand Trunk Western | 1 |
HLMX
| Helm Financial Corporation | 1 |
HZGX
| Herzog Contracting Corporation | 27 |
METX
| METRA | 3 |
MGA
| Monongahela RR | 1 |
MNCW
| Metro-North Commuter Railroad | 21 |
NS
| Norfolk Southern | 9 |
NYOW
| New York, Ontario & Western | 1 |
SIRT
| Staten Island Rapid Transit | 7 |
SOU
| Southern | 1 |