D.080 is a 295 km (183 mi) long state highway running from Horasan, Erzurum Province to the border with Azerbaijan near Dilucu. The route connects to Azerbaijan, via the Nakhchivan Autonomous Republic, and is the only crossing between the two countries. The route is mostly a non-divided, four-lane highway.
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| Route information | |
| Length | 295 km (183 mi) |
| Major junctions | |
| West end |  D.100 in Horasan |
| East end |  M7 at the Azerbaijani border near Dilucu |
| Location | |
| Country | Turkey |
| Highway system | |