D.850
Route information
Length	852 km (529 mi)
Major junctions
North end	Ünye (Black Sea coast)
South end	Öncüpınar (Syrian border)
Location
Country	Turkey
Highway system
Highways in Turkey Motorways List State Highways List

D.850 is a north-to-south state road in Turkey. It starts at Ünye at the Black Sea coast and ends at Öncüpınar, which hosts a Turkish border check point with Syria.^[1] Since it runs all the way from north to south, it crosses the three main west-to-east highways, namely the D.100, D.300 and D.400.