| Abbreviation | Definition |
|---|---|
| RIMX | Ready Mixed Concrete |
| RIMX | Ready Mixed Concrete Company |
| RINM | Rail Infrastructure Network Model |
| RIRX | Southeastern Industrial Enterprises |
| RIS | Rail Integration System |
| RIS | Rail Interface System |
| RISEN | Rail Infrastructure Systems Engineering Network |
| RITES | Rail India Technical Economic Services |
| RIVAS | Railway Induced Vibration Abatement Solutions |
| RIVIT | Railway Infrastructure and Vehicle Inspection Technology |
| RIW | Rail Industry Worker |
| RJCC | R.J. Corman Railroad Central Kentucky Lines |
| RJCL | R. J. Corman Railroad Company/ Cleveland line |
| RJCL | R.J. Corman Railroad Cleveland line |
| RJCM | R. J. Corman Railroad Company/ Memphis Line |
| RJCM | R.J. Corman Railroad Memphis Line |
| RJCN | R. J. Corman Railroad Company/ Allentown Lines Incorporated |
| RJCN | R.J. Corman Railroad Allentown Lines |
| RJCP | R. J. Corman Railroad Company/ Pennsylvania Lines Incorporated |
| RJCP | R.J. Corman Railroad Pennsylvania Lines |