| Abbreviation | Definition |
|---|---|
| DAN | Diver's Alert Network |
| DAR | Dial-A-Ride |
| DARC | Direct Access Radar Channel |
| DARPS | Dynamic Aircraft Route Planning System |
| DART | Dallas Area Rapid Transit |
| DART | Dial A Ride Transit |
| DART | Directed Area Response Transportation |
| DART | Dublin Area Rapid Transit |
| DARTA | Detroit Area Regional Transportation Authority |
| DARTS | Disabled and Aged Regional Transportation System |
| DARV | Driver Awareness Research Vehicle |
| DASCAR | Data Acquisition System for Crash Avoidance Research |
| DASH | Downtown Anchorage Short Hop |
| DASI | Digital Altimeter Setting Indicator |
| DASPA | Dominica Air and Sea Ports Authority |
| DAST | Delaware Administration for Specialized Transportation |
| DATO | Disbursing and Transportation Office |
| DATS | Danville Area Transportation Study |
| DATS | Division of Amenities and Transportation Services |
| DATV | Direct Airside Transit Visa |