| Abbreviation | Definition |
|---|---|
| ATSF | Atchison, Topeka and Santa Fe Railroad |
| ATSIP | Association of Transportation Safety Information Professionals |
| ATT | Advanced Transport Telematics |
| ATTB | Advanced Technology Transit Bus |
| ATTC | Advanced Transportation Technology Center |
| ATTC | American Tug and Transit Company |
| ATTESA | Advanced Total Traction Engineering System for All-Terrain |
| ATTLA | Air Transportability Test Loading Agency |
| ATTS | Active Torque Transfer System |
| ATTS | Advanced Transportation Technology Stakeholders |
| ATTT | Agence Technique des Transports Terrestres |
| ATU | AmWINS Transportation Underwriters |
| ATV | Accurate Traffic Volume |
| ATV | Adjustable Travel Volume |
| ATV | All Terrain Vehicle |
| ATV | All Terrain Vehicles |
| ATV | All-terrain vehicles |
| ATV | Awesome Transportation Vechicle |
| ATVC | Advanced Transit Vehicle Consortium |
| ATVU | All Terrain Vehicle Utility |