| Abbreviation | Definition |
|---|---|
| TRP | Transportation Reaching People |
| TRPT | Transit Riders for Public Transportation |
| TRR | Transportation Research Record |
| TRRL | Transport and Road Research Laboratory |
| TRS | Throttle Return Spring |
| TRS | Transportation Research Syntheses |
| TRS | Transportation Research Synthesis |
| TRS | Transportation Risk Specialist |
| TRS | Turbulence Reduction System |
| TRSA | Terminal Radar Service Area |
| TRT | Transportation Research Thesaurus |
| TRTC | Tarrant Regional Transportation Coalition |
| TRTS | Tram Ready To Start |
| TRU | Transportation Riders United |
| TRUCKERGIG | TruckerGig provides the world's largest Transportation Logistics network with millions of contacts, |
| TRUST | Transportation Revenues Used Solely For Transportation |
| TRV | Two Rider Vehicle |
| TRX | Traction Rubber X |
| TS | Terminal Services |
| TS | Thermo Start |