AA
| Ann Arbor | 1 |
BO
| Baltimore & Ohio | 2 |
CR
| Conrail | 5 |
DLW
| Delaware Lackawanna & Western | 2 |
LNE
| Lehigh and New England Ry | 1 |
LV
| Lehigh Valley | 1 |
OHCR
| Ohio Central | 3 |
POHC
| Pittsburgh & Ohio Central | 2 |
SBVR
| South Branch Valley Rail Road | 2 |
SRC
| Strasburg Railroad | 7 |
TRRX
| TRRX | 1 |
WM
| Western Maryland | 2 |