BR
| Buffalo and Pittsburgh | 4 |
BST
| BST | 1 |
CR
| Conrail | 8 |
CSX
| CSX Railroad | 25 |
ET
| ET | 7 |
IC
| Illinois Central | 3 |
ICG
| Illinois Central Gulf | 1 |
KBR
| KBR | 3 |
LMIX
| Loram Maintenance of Way Inc. | 2 |
NHVR
| New Hope Valley Railroad | 1 |
NS
| Norfolk Southern | 50 |
NW
| Norfolk & Western | 47 |
PTS
| PTS | 1 |
RAM
| RAM | 2 |
SOU
| Southern | 27 |
SPSX
| Progress Rail Services Corp | 2 |
SRS
| Sperry Rail Service | 3 |
TH
| TH | 1 |
UP
| Union Pacific Railroad Company | 3 |
URS
| URS | 1 |