D.915 is a north-to-south state road in northeastern Turkey. The road starts at Of, Trabzon on the coast of the Black Sea branching from D.010 and ends in Aà Âkale, Erzurum joining D.100 running in a high-elevation mountainous terrain. The route is composed of two parts crossed and overlapped by D.050 on a length of north of Bayburt. The northern part, between Of and Bayburt is long, and the southern part, between Bayburt and Aà Âkale is . The northern section, which is the Derebaà Âñ curves, is considered one of the most dangerous routes in the world.
The route's northern part runs through the Trabzon Province districts Dernekpazarñ and ÃÂaykara, passes by Uzungöl and crosses Mount SoÃÂanlñ of the Karadeniz Mountain Range with the SoÃÂanlñ Pass at AMSL on the province border Trabzon-Bayburt, and crosses over ÃÂoruh River before joining D.050.
Starting on the junction of D.050 in Bayburt, the southern part of the route runs through Maden, crosses Mount Kop of the Otlukbeli Mountains with the Kop Pass at AMSL just south of the province border Bayburt-Erzurum, where a highway tunnel is under construction to ease the route with several hairpin turns. It reaches AÃ Âkale on the D.100 (E80). The route from Bayburt to AÃ Âkale is part of European route E87.
Built in 1916 by the Russian soldiers following the Trebizond Campaign, the road from Of to Bayburt runs on Mt. SoÃÂanlñ climbing up to an elevation of above sea level. The route without guardrails includes 29 steep hairpin turns. While the start and end sections of the route are paved with asphalt, the center part is only gravel. It is difficult to travel particularly in wet and dark conditions or by fog and snow, and it is considered one of the most dangerous roads in the world, even more dangerous than the Death Road in Bolivia.
Named Derebaà Âñ Turns, the most risky part of the route is situated in ÃÂaykara with 13 hairpin turns. Over a stretch of only , the route's elevation changes from .