| Abbreviation | Definition |
|---|---|
| OTEC | Ohio Transportation Engineering Conference |
| OTESP | Orlando Transportation Experimental Simulation Program |
| OTG | Off The Ground |
| OTI | Ocean Transportation Intermediaries |
| OTIS | Office of Transportation Infrastructure and Sustainability |
| OTM | Office of Transportation Management |
| OTM | Oracle Transportation Management |
| OTMS | Oregon Transportation Management System |
| OTMS | Oregon Transportation Management Systems |
| OTNS | Other Than Normal Spacing |
| OTO | Once- Through Oil |
| OTO | Ozarks Transportation Organization |
| OTP | On-Time Performance |
| OTPS | Oceanic Traffic Planning System |
| OTR | Oceanic Transition Route |
| OTR | Off The Road |
| OTS | Office of Traffic Safety |
| OTS | Open-Top Sports sedan |
| OTS | Optimal Transportation Spend |
| OTS | Organized Track System |