The Ankara–Istanbul high-speed railway (Turkish: Ankara–İstanbul yüksek hızlı demiryolu), is a 533 km (331 mi) long high-speed railway currently running between Ankara and Halkalı (in Istanbul). As of March 2019 most services terminate at Söğütlüçeşme railway station in the Kadıköy district of İstanbul and the fastest journey time between Söğütlüçeşme and Ankara is 4 hours and 15 minutes.