Northern Expressway, also known as the Fatchen Northern Expressway, is a 21 kilometre long controlled-access highway in Adelaide, South Australia. Since March 2020, the North–South Motorway continues west of Port Wakefield Highway and intersects the Port River Expressway to reach the harbour at Port Adelaide. These are the northernmost two parts of the North–South Corridor.

The North–South Motorway is a partially complete motorway traversing the inner western suburbs of Adelaide, from Waterloo Corner in the north to Bedford Park in the south. Progressively constructed in stages since 2010, once complete it will replace the adjacent South Road as Adelaide's main north–south roadway. It will form the central section of the North–South Corridor, being flanked north and south by the Northern Expressway and Southern Expressway, respectively. It is designated part of route M2.