BO
| Baltimore & Ohio | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 2 |
DH
| Delaware & Hudson | 2 |
GU
| Grafton and Upton Railroad Company | 1 |
MBA
| MBA | 1 |
MBTA
| Massachusetts Bay Transit Authority | 7 |
NYSW
| New York Susquehanna & Western | 1 |
SBD
| Seaboard System | 1 |