NorthConnex is a 9-kilometre (5.6 mi) twin-tube motorway tunnel in northern Sydney, New South Wales, Australia, opened on 31 October 2020. It acts as a tunnel bypass of the congested Pennant Hills Road, connecting the M1 Pacific Motorway to the M2 Hills Motorway. Owned by NorthWestern Roads (NWR) Group, it is one of the longest road tunnels in Australia along with the M8 Tunnel. It is also the deepest road tunnel in Australia, with more than half of the tunnel 60 metres (200 ft) deep or more, and the deepest point is underneath the Sydney Metro Northwest, about 90 metres (300 ft) below ground.