ACL
| Atlantic Coast Line | 16 |
AMTK
| Amtrak | 4 |
AR
| Aberdeen and Rockfish | 1 |
BM
| Boston & Maine | 2 |
CASS
| Cass Scenic | 1 |
CO
| Chesapeake & Ohio | 4 |
CRR
| Clinchfield | 3 |
CSX
| CSX Railroad | 2 |
CV
| Central Vermont | 1 |
GA
| Georgia Railroad | 5 |
HRT
| Hartwell RR | 1 |
LN
| Louisville & Nashville | 2 |
LRS
| Laurinburg and Southern | 1 |
LVRC
| Lamoille Valley | 2 |
NS
| Norfolk Southern | 4 |
NW
| Norfolk & Western | 8 |
PN
| PN | 9 |
RFP
| Richmond Fredericksburg & Potomac | 2 |
SAL
| Seaboard Air Line | 18 |
SCL
| Seaboard Coast Line | 9 |
SOU
| Southern | 47 |
VTR
| Vermont Railway | 1 |
WECX
| Westinghouse Electric Corporation | 1 |