The Bosphorus Bridge (Turkish: Boğaziçi Köprüsü), known officially as the 15 July Martyrs Bridge (Turkish: 15 Temmuz Şehitler Köprüsü) and unofficially as the First Bridge (Turkish: Birinci Köprü), is one of the three suspension bridges spanning the Bosphorus strait (Turkish: Boğaziçi) in Istanbul. It is connecting Europe and Asia (alongside Fatih Sultan Mehmet Bridge and Yavuz Sultan Selim Bridge). The bridge extends between Ortaköy (in Europe) and Beylerbeyi (in Asia). The bridge is a gravity-anchored suspension bridge with steel towers and inclined hangers. The aerodynamic deck hangs on steel cables. It is 1’560 meters long with a deck width of 33.40 meters. The distance between the towers is 1’074 meters and the total height of the towers is 165 meters. The clearance of the bridge from sea level is 64 meters. For the first three years following its completion in 1973, pedestrians could walk over the bridge, reaching it with elevators inside the towers on both sides. However, today no pedestrians or commercial vehicles, such as trucks, are allowed to use the bridge.