The Otoyol 7 (O-7; English: Motorway 7), or Northern Marmara Motorway, is a planned motorway around the northern sections of Istanbul and which is currently (2016) partly under construction. The highway crosses the Bosphorus Strait via the Yavuz Sultan Selim Bridge, which was opened in August 2016. The route is intended to serve as the outermost beltway of Istanbul as well as being the third motor-crossing of the Bosphorus. The route stretches 431 km (268 mi) from Kınalı, on the European side, to Akyazı on the Asian side. Connections to the O-4 as well as both the Bosphorus and Fatih Sultan Mehmet bridges will be built as the Northern Marmara Motorway will bypass Istanbul to the north.