ACL
| Atlantic Coast Line | 1 |
AMTK
| Amtrak | 1 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
BLE
| Bessemer & Lake Erie | 2 |
BN
| Burlington Northern | 4 |
CN
| Canadian National Railways | 3 |
CO
| Chesapeake & Ohio | 1 |
CR
| Conrail | 54 |
CSX
| CSX Railroad | 140 |
GREX
| Georgetown Rail Equipment Company | 1 |
ICG
| Illinois Central Gulf | 1 |
LN
| Louisville & Nashville | 5 |
MP
| Missouri Pacific | 1 |
MRL
| Montana Rail Link | 1 |
NS
| Norfolk Southern | 17 |
NW
| Norfolk & Western | 4 |
NYC
| New York Central | 40 |
PC
| Penn Central | 5 |
SBD
| Seaboard System | 12 |
SCL
| Seaboard Coast Line | 5 |
SOU
| Southern | 30 |
SP
| Southern Pacific | 2 |
UP
| Union Pacific Railroad Company | 2 |