| Abbreviation | Definition |
|---|---|
| RAJP | Road At Junction Point |
| RALF | Roads And Lighting Faults |
| RALON | Regional Airline Liaison Network |
| RAM | Ridiculous Amount of Mileage |
| RAMS | Road Asset Management System |
| RAMS | Roadmaster Active Suspension System |
| RAP | Rear Area Protection (car crumple zone) |
| RAP | Relative Accident Probability |
| RAP | Roadside Assistance Program |
| RAP | Runs Above Position |
| RAPCON | Radar Approach Control |
| RAPID | Reforming Accelerating And Protecting Interstate Design |
| RAPT | Route Availability Planning Tool |
| RAR | Road Accident Rescue |
| RARET | Regional Alliance for Resilient and Equitable Transportation |
| RAS | Rootes Armstrong Siddely |
| RASCAL | Rotorcraft Aircrew Systems Concepts Airborne Laboratory |
| RASK | Roadmaster Active Suspension Kit |
| RASV | Reusable Aerodynamic Space Vehicle |
| RAT | Radically Altered Transportation |