ACL
| Atlantic Coast Line | 1 |
BA
| Baltimore & Annapolis | 1 |
BBCX
| ABB Power Generation Incorporated | 1 |
BO
| Baltimore & Ohio | 34 |
CG
| Central Of Georgia | 5 |
CHRX
| The Chesapeake Division | 1 |
CO
| Chesapeake & Ohio | 6 |
CR
| Conrail | 2 |
CRR
| Clinchfield | 2 |
CSX
| CSX Railroad | 13 |
DLW
| Delaware Lackawanna & Western | 3 |
GANO
| Georgia Northern Railway Company | 1 |
GNRR
| Georgia Northeastern | 1 |
IC
| Illinois Central | 1 |
ICG
| Illinois Central Gulf | 3 |
LN
| Louisville & Nashville | 1 |
MDDE
| Maryland and Delaware Railroad | 1 |
MEC
| Maine Central | 4 |
MGA
| Monongahela RR | 7 |
MSW
| MSW | 3 |
MTR
| Montour RR | 3 |
NKP
| Nickel Plate | 1 |
NS
| Norfolk Southern | 3 |
NW
| Norfolk & Western | 1 |
PC
| Penn Central | 8 |
PLE
| Pittsburgh & Lake Erie | 11 |
PRR
| Pennsylvania Railroad | 1 |
RDG
| Reading Railroad | 2 |
RFP
| Richmond Fredericksburg & Potomac | 2 |
RSMX
| Reserve Mining | 1 |
SAL
| Seaboard Air Line | 1 |
SBD
| Seaboard System | 6 |
SCL
| Seaboard Coast Line | 5 |
SOU
| Southern | 39 |
TF
| Tallulah Falls Ry. Co | 1 |
UNSX
| Rail Logistics, LC | 1 |
URR
| Union Railroad | 1 |
USN
| United States Navy | 1 |
WAB
| Wabash | 2 |
WM
| Western Maryland | 4 |
WT
| Wrightsville & Tennille | 1 |