| Abbreviation | Definition |
|---|---|
| RTPO | Regional Transportation Planning Office |
| RTPO | Rural Transportation Planning Organization |
| RTQC | Real Time Quality Control |
| RTR | Rear Tread Removed |
| RTR | Remote Transmitter/Receiver |
| RTRP | Road Traffic Reduction Plan |
| RTRRM | Response Type Road Roughness Meter |
| RTS | Rapid Transit Series |
| RTS | Ready To Ship |
| RTS | Remote Terminal Site |
| RTSD | Railroad Transportation Safety District |
| RTSP | Regional Transportation System Plan |
| RTSP | Regional Transportation Systems Plan |
| RTT | Raw Turn Time |
| RTT | Round Trip Table |
| RTT | Round Trip Time |
| RT-TRACS | Real-Time Traffic Adaptive Signal Control |
| RTV | rapid transit vehicles |
| RTV | Road Taxed Vehicle |
| RTV | Rugged Terrain Vehicle |