AGR
| Alabama and Gulf Coast | 2 |
BNSF
| BNSF Railway | 8 |
CIRR
| Chattahoochee Industrial Railroad | 1 |
CMHX
| CarMath Incorporated | 37 |
CSX
| CSX Railroad | 6 |
KCS
| Kansas City Southern | 1 |
MP
| Missouri Pacific | 4 |
NS
| Norfolk Southern | 4 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
WP
| Western Pacific | 1 |