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.Vatan Türkiye Turizm Atlası, Boyut Yayıncılık, İstanbul, 2009 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.
Itinerary ProvinceLocationDistance from Ünye (km)Distance from Ünye (mile)Distance from Öncüpınar (km)Distance from Öncüpınar (mile)OrduÜnye00852529Tokat Niksar10766745463Tokat161100691429Sivas Yıldızeli222138630391Sivas263163589366Gürün405252447278Malatya Darende441271411255MalatyaActually a junction 19 km. west of Malatya. 532331320199Adıyaman Gölbaşı632393220137Besni675419177110Gaziantep Araban71444413886Gaziantep7794847345Kilis Kilis88452485Öncüpınar85252900
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