AT
| Auto Train | 1 |
BNSF
| BNSF Railway | 4 |
CN
| Canadian National Railways | 1 |
CNJ
| Central Rail Road of New Jersey | 2 |
CSX
| CSX Railroad | 1 |
DOTX
| USDOT/Federal Railroad Administration | 15 |
GTW
| Grand Trunk Western | 4 |
MHWA
| Mohawk Adirondack and Northern Railroad | 1 |
MKT
| Missouri-Kansas-Texas | 1 |
PC
| Penn Central | 2 |
RBX
| Ringling Bros. and Barnum and Bailey | 1 |
REX
| Railway Express Agency, Inc. | 1 |
UPP
| Union Pacific Passenger | 7 |