The motorway is 248 km in length between the Kınalı junction and the Akyazı junction, and is 8 lanes wide (4+4 lanes).Within the scope of the Build-Operate-Transfer Model Construction, Operation and Transfer of Kınalı-Odayeri (Including Connection Roads) Section (North Marmara Europan Motorway) and Kurtköy-Akyazı (Including Connection Roads) Section (North Marmara Anatolian Motorway) of the Northern Marmara Motorway (Including the 3rd Bosphorus Bridge) Project, it is composed of two separate authorized companies, namely "AVRUPA OTOYOLU YATIRIM VE İŞLETME AŞ".

on the European side and "KMO ANADOLU OTOYOLU İŞLETME AŞ".

[4] The completed section of 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 road crossing of the Bosphorus.

Connections to the O-4 as well as both the Bosphorus and Fatih Sultan Mehmet bridges will be built as the Northern Marmara Motorway and will bypass Istanbul to the north.