| Abbreviation | Definition |
|---|---|
| RG | Race Gas |
| RG | Rear Gear |
| RG | Rectractable Gear |
| RG | Remember the Gear |
| RG | Retractable Gear |
| RGA | Return Goods Authorization |
| RGCSP | Review of General Concepts of Separation Panel |
| RGL | FAA ( Federal Aviation Administration) Regulatory Guidance Library |
| RGP | Rigid Gas Permeable |
| RGP | Rigid Gas Permiable |
| RGR | Regional Rail |
| RH | Ranch Hauler |
| RH | Roadside Hazard |
| RHD | Right Hand Drive |
| RHM | Raised Horizontal (pavement) Markers |
| RHV | Rigid Hydrostatic Vehicle |
| RI | Rear Impact |
| RIA | Regulatory Impact Analysis |
| RIBC | Rigid Intermediate Bulk Container |
| RIC | Richmond International Airport - Byrd Field |