AM
| Arkansas & Missouri | 6 |
ATSF
| Atchison Topeka & Santa Fe | 5 |
BLE
| Bessemer & Lake Erie | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 2 |
CBQ
| Chicago Burlington & Quincy | 2 |
HCSX
| Helm Chesapeake LLP | 2 |
ITFX
| INFINITY TRANSPORTATION III LLC | 1 |
MP
| Missouri Pacific | 1 |
SCWX
| South Carolina Public Service Authority | 8 |
UCEX
| Union Electric Company | 1 |
WDPX
| GASCOYNE MATERIALS HANDLING & RECYCLING, LLC | 1 |
WFAX
| Western Fuels Association Incorporated (Colo.) | 4 |