BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 3 |
CP
| Canadian Pacific Railway | 3 |
CR
| Conrail | 9 |
CSX
| CSX Railroad | 2 |
GNWR
| Genesee and Wyoming Railroad Company | 2 |
IC
| Illinois Central | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 8 |
SP
| Southern Pacific | 4 |
WPRR
| Willamette and Pacific | 4 |