Tunnel air quality

Live air quality data is available on the NorthConnex website

NorthConnex is a nine kilometre tunnel linking the M1 Pacific Motorway at Wahroonga to the Hills M2 Motorway at West Pennant Hills. NorthConnex is one of the longest and deepest road tunnels in Australia, removing around 5,000 trucks off Pennant Hills Road each day. NorthConnex is operated in accordance with the Conditions of Approval established by the NSW Government and approved by the NSW Minister for Planning.