| Abbreviation | Definition |
|---|---|
| TMS | Transportation Management System |
| TMSA | Transportation Marketing and Sales Association |
| TMSA | Truckee Meadows Service Areas |
| TMSH | Traffic Management Shell |
| TMT | Take Me There |
| TMTC | Texas Motor Transportation Consultants |
| TMU | Traffic Management Unit |
| TMU | True Mileage Unknown |
| TMV | Transportation Motor Vehicle |
| TNA | Transport Network Analysis |
| TNC | Transportation Network Companies |
| TNC | Transportation Network Company |
| TNIP | Transportation Network Improvement Plan |
| TNM | Traffic Noise Model |
| TNM&O | Texas, New Mexico, and Oklahoma Coaches (now part of Greyhound) |
| TNO | Transportation Network Operator |
| TNP | Transportation Network Provider |
| TNPK | Turnpike |
| TNRDA | Transit Network Route Decision Aid |
| TNS | Toyota Navigation System |