The Euphrates Viaduct is a motorway bridge across the Euphrates between Belkıs, Nizip, Gaziantep Province and Birecik, Şanlıurfa Province in Turkey. Built up to 2007, it is the longest river bridge in Turkey. Buses and other cars going from the three big cities (Istanbul, Ankara and Izmir) to Diyarbakır, play an important role on this viaduct. Cars going to Diyarbakır can also use the Kömürhan Bridge which carries D-300 state roadway between Malatya and Elazığ.