ACL
| Atlantic Coast Line | 1 |
AMTK
| Amtrak | 3 |
CNJ
| Central Rail Road of New Jersey | 3 |
DLW
| Delaware Lackawanna & Western | 1 |
ERIE
| Erie Railroad | 1 |
LHR
| Lehigh & Hudson River | 1 |
LI
| Long Island Rail Road Company | 3 |
LV
| Lehigh Valley | 3 |
NW
| Norfolk & Western | 1 |
PRR
| Pennsylvania Railroad | 18 |
PRSL
| Pennsylvania Reading Seashore | 2 |
RDG
| Reading Railroad | 7 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
RUT
| Vermont Railway Incorporated | 1 |
UP
| Union Pacific Railroad Company | 2 |
UPP
| Union Pacific Passenger | 1 |