State Highway 20 (New Zealand) partially coincident with Western Ring Route
Route
SH 20 begins from the Auckland Southern Motorway (SH 1) at Manukau, then heads northwest to Māngere. It then runs over the Māngere Bridge to Onehunga, whereupon it continues northwest, cutting through Mount Roskill and Owairaka. It then enters the Waterview Tunnel, New Zealand's longest road tunnel, before ending at a junction with the Northwestern Motorway (SH 16)
partially overlapping with partially intersecting with partially sharing with partially matching with partially aligning with