| Abbreviation | Designation | |
|---|---|---|
| DD | Doppeldecker-Bus (German) | vehicle fleet |
| DD | Doppelstock-Autoreisezugwagen (German) | classification |
| DD | Dresden Hbf, Landeshauptstadt Dresden (German) | fare point / vehicle registration plate |
| 50 / DD | DDR, Deutsche Demokratische Republik (German) GDR, German Democratic Republic (GDR, East Germany) | country code |