| Abbreviation | Definition |
|---|---|
| DCAP | Driver Competency Assessment Protocol |
| DCC | Display Channel Complex |
| DCDL | Driver Controlled Differential Lock |
| DCFY | Dequindre Cut Freight Yard |
| DCM | Dangerous Cargo Manifest |
| DCPT | Diesel Catalyzed Particulate Trap |
| DCRG | Dynamics and Control Research Group |
| DCS | Deer Crossing Sign |
| DCT | Delaware Center for Transportation |
| DCTA | Denton County Transportation Authority |
| DCV | Destination Coded Vehicle |
| DCV | Dynamics Control and Vehicle |
| DDC | Detroit Diesel Corporation |
| DDDI | Dula Dangerous Driving Index |
| DDFS | Darling Downs Freight Service |
| DDMV | Delaware Division of Motor Vehicles |
| DDMV | Direct Digital Manufactured Vehicle |
| DDOT | DC Department of Transportation |
| DDOT | Detroit Department of Transportation |
| DDOT | District Department of Transportation |