The nine kilometre NorthConnex twin tunnel motorway is expected to open in 2020. NorthConnex will provide a direct connection between the M1 Pacific Motorway at Wahroonga and the Hills M2 Motorway at West Pennant Hills.

The $3 billion project is being delivered by Transurban in partnership with the Australian and NSW Governments.

Northconnex will deliver faster, safer, more reliable and more efficient journeys for road users. It will also return local roads to local communities, improve air quality along Pennant Hills Road and reduce congestion and noise.

We will only be able to deliver some of the benefits of NorthConnex by removing some of the truck and bus traffic from Pennant Hills Road. To find out more visit the Pennant Hills Road regulation webpage.

The NorthConnex Project Company is delivering NorthConnex for the NSW Government. It has engaged Lendlease Bouygues Joint Venture (LLBJV) to design and build NorthConnex.

  • Start of major construction: June 2015
  • Expected completion: Mid 2020
Looking down M110 Southern.
Looking down M110 Southern.

Project objectives

  • Provide shorter travel times, while also providing safer, more reliable trips.
  • By avoiding 21 sets of traffic lights, NorthConnex offers a straighter, flatter route for improved fuel efficiency, with reduced maintenance costs from stop/start wear and tear.
  • Motorists will save up to 15 minutes by using NorthConnex, improving the efficient movement of freight.
  • Drivers will be able to bypass 40 sets of traffic lights on the Pacific Highway to the centre of Sydney.
  • NorthConnex will provide two 3.5 metre wide lanes with a breakdown lane in each direction to minimise delays from incidents.
  • NorthConnex will deliver significant benefits to local communities by easing congestion and removing up to 5000 trucks daily from Pennant Hills Road. This will help improve safety, local air quality and reduce traffic noise.
  • NorthConnex will boost productivity for the freight network, supporting businesses to be more competitive and contributing to a stronger economy.

Project features

  • Twin nine kilometre motorway tunnels with two lanes and a breakdown lane in each direction, with three lane capacity for future traffic growth
  • A Northern Interchange connecting the M1 Pacific Motorway, the Pacific Highway and Pennant Hills Road
  • A northern ventilation outlet and support facilities located within and immediately adjacent to the existing M1 Motorway corridor
  • A Southern Interchange connecting with Pennant Hills Road and the Hills M2 Motorway
  • A motorway control centre, ventilation outlet and support facilities located near the Southern Interchange
  • Integration on the Hills M2 Motorway to provide an extra 3.5 km westbound lane, on and off-ramps, 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, Wahroonga and the Hills M2 Motorway at Pennant Hills Road
  • Tunnel support facilities to provide air intake systems, emergency smoke extraction outlets and substations.

For further details on the project, refer to the NorthConnex website.


Northconnex map

Media releases



For further media releases on the project refer to the NorthConnex website.

Environmental assessment

The Environmental Impact Statement (EIS) and related documents are available from the NorthConnex website.

Hornsby Quarry Road Construction Spoil Management project

The NorthConnex project has delivered more than one million cubic metres of excavated rock and soil to partially fill Hornsby Quarry.

The site was handed back to Hornsby Shire Council in 2019.

NorthConnex has filled the quarry to a level that will allow Hornsby Shire Council to start rehabilitating the site as a public recreation area benefiting the local community.

For more information see Hornsby Quarry Road Construction Spoil Management project.

Archive of project documents

Current documents related to the project are available on the NorthConnex website.

Earlier documents are available on the Documents archive page.

Project contact

For further information contact the NorthConnex project team:

Phone: 1800 997 057 (free call 24 hours)


Mail: Community Relations Team, Locked Bag 1001, West Pennant Hills NSW

Visit: NorthConnex Community Information Centre - 118 Yarrara Road, Pennant Hills
9am - 1pm on Mondays, Tuesdays and Wednesdays or by appointment. Due to COVID-19 restrictions, the NorthConnex Community Information Centre is temporarily closed.

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