| Abbreviation | Definition |
|---|---|
| CHRU | Chemours Fc |
| CHRX | Chesapeake Division |
| CHRX | The Chesapeake Division |
| CHS | Charlotte Southern Railroad |
| CHSR | California High Speed Rail |
| CHSR | California High-Speed Rail |
| CHSX | Cenex Harvest States Cooperative |
| CHSZ | City of Hot Springs (Intermodal Services Inc.) |
| CHSZ | Intermodal Services Incorporated |
| CHTS | Chester Valley Railroad (Penn Eastern Rail Lines) |
| CHTS | Penn Eastern Rail Lines Incorporated |
| CHTT | Chicago Heights Terminal Transfer Railroad (Union Pacific Railroad) |
| CHTT | Union Pacific Railroad Company |
| CHV | Chattahoochee Valley Railway |
| CHVX | Chevron Chemical |
| CHVX | Chevron Chemical Company |
| CHW | Chesapeake Western Railway (Norfolk Southern) |
| CHW | Norfolk Southern Railway Company |
| CI | Cambria and Indiana Railroad |
| CI | Cambria and Indiana Railroad Company |