AOK
| Arkansas-Oklahoma Railroad | 9 |
BNSF
| BNSF Railway | 1 |
CHTT
| Chicago Heights Terminal Transfer | 1 |
CR
| Conrail | 8 |
CSS
| Chicago South Shore And South Bend | 1 |
CSX
| CSX Railroad | 8 |
GRW
| Gary Railway | 1 |
IHB
| Indiana Harbor Belt | 2 |
NKLX
| NKLX | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 25 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 1 |
SCIH
| South Chicago & Indiana Harbor Railway C | 1 |
SOU
| Southern | 2 |
UP
| Union Pacific Railroad Company | 2 |