IARX
| InStar Leasing | 1 |
IC
| Illinois Central | 2 |
JTSX
| Joseph Transportation Incorporated | 1 |
KWT
| KWT Railway | 1 |
KXHR
| Knoxville & Holston River RR | 1 |
LN
| Louisville & Nashville | 1 |
NW
| Norfolk & Western | 1 |
SBD
| Seaboard System | 1 |
SOU
| Southern | 1 |
TTPX
| TTX Company - Bulkhead Flats | 2 |