Project overview

With our Westlink M7 partners we are working on the construction of a twin 9km dual-lane tunnel that will link Sydney's M1 Pacific Motorway at Wahroonga to the Hills M2 Motorway at the existing Pennant Hills Road interchange. Built for two lanes, the tunnel includes capacity for future expansion to three lanes and will accommodate vehicles up to 5.3m high.

When complete, NorthConnex will link Sydney's north to the orbital network and form part of the National Highway route.

The scope of the NorthConnex project includes:

  • construction of a twin 9km dual-lane tunnel with capacity for future expansion to three lanes
  • a northern interchange at Pennant Hills Road and the M1 Pacific Motorway
  • a southern interchange at Pennant Hills Road and the Hills M2 Motorway
  • integration work on the Hills M2 Motorway to provide an extra 3.5km lane and bridge widening works from Pennant Hills Road to the Windsor Road interchange
  • on and off-ramps linking the tunnel and the existing M1 Pacific Motorway north of Edgeworth David Avenue
  • local roadwork including widening at Eaton Road near the southern interchange and repositioning of the Hewitt Avenue cul-de-sac near the northern interchange


Once complete, NorthConnex will:

  • reduce traffic congestion by diverting up to 5,000 trucks per day from Pennant Hills Road
  • offer motorists up to 15 minutes in saved travel time
  • allow motorists to bypass up to 21 traffic lights
  • return local streets to local communities
  • create more efficient movement of state and national freight
  • provide opportunities for improved public transport
  • integrate with the regional transport network by connecting the orbital network with the M1

Timing & cost

Construction on NorthConnex started in 2015 and is due for completion in 2019.

The $2.9 billion project comprises a $2.65 billion design and construction contract delivered by Lend Lease and Bouygues Construction, along with land and project delivery costs. It will be funded through toll charges with a contribution from the NSW and Federal Governments of up to $405 million each.

For more information visit the NorthConnex project site.