The Northern Road Upgrade, Peter Brock Drive to Mersey Road

The Australian and NSW governments are upgrading The Northern Road as part of the Western Sydney Infrastructure Plan (WSIP), a 10 year, $3.6 billion road investment program.

The Northern Road Upgrade will deliver new and upgraded roads to support integrated transport in the region and capitalise on the economic benefits from developing the Western Sydney Airport at Badgerys Creek. It would also improve safety, increase road capacity and reduce congestion and travel times in the future.

This second stage of The Northern Road Upgrade covers about 11.5 kilometres between Peter Brock Drive, Oran Park and Mersey Road, Bringelly, including the intersection of The Northern Road and Bringelly Road which will be built as an interchange (underpass).

The Northern Road, south of Bringelly Road and Greendale Road intersection.

Updates and announcements

Roads and Maritime Services expects to award the construction tender in the coming months. This project now includes the Bringelly Road Upgrade between The Northern Road, Bringelly and King Street, Rossmore and the interchange (underpass) at Bringelly Road and The Northern Road. For more information, read our latest community update (PDF, 2MB).

Project snapshot

  • Contractor: TBA
  • Start date of major construction: mid-2017
  • Expected completion date: mid-2020
  • Project value (of all six sections of The Northern Road): $1.6 billion
  • Funding: Australian and NSW governments.

Project background

The Northern Road Upgrade between Peter Brock Drive, Oran Park and Mersey Road Bringelly is about 11.5 kilometres long. The Northern Road will be one of the main arterial transport corridors within Sydney’s South West Priority Growth Area. As residential and commercial development occurs, the amount of traffic in the area is expected to increase on The Northern Road. The Northern Road Upgrade will also support the Western Sydney Airport at Badgerys Creek.

Roads and Maritime displayed the concept design and Review of Environmental Factors in October 2012. Community feedback received during the environmental assessment and our responses are provided in a Submissions Report.


The key benefits of the project are:

  • Increased capacity to cater for future population growth in the area
  • Improved safety for motorists by:
    • Building new intersections with traffic lights to access precincts
    • Building a central median to separate opposing traffic flows
    • Building turning lanes at intersections
  • Improved safety for cyclists and pedestrians through an off-road shared path
  • Improved travel times and capacity to accommodate future development needs
  • Access to future South West Priority Growth Area along The Northern Road
  • Improved access and travel times for road freight in Sydney’s south west.

Key features

 The key features of the project include:

  • Widening from a generally two lane to a four lane, divided road with a four metre wide shoulder and wide central median allowing for widening to six lanes, if required in the future
  • A grade separated interchange (underpass) at Bringelly Road to the east of Bringelly Village shops and the existing intersection with Bringelly Road/Greendale Road
  • A speed limit of 80km/h
  • A three metre wide shared pedestrian/cyclist path on the eastern side
  • Adjustments to public facilities such as gas, electricity, water, and telecom services along the route
  • Designated turning lanes and bicycle and pedestrian crossing provisions at traffic lights
  • Upgrade and/or tie in with local roads where required
  • Bus priority lanes at traffic lights and indented bus bays
  • Temporary U-turn facilities at some future precinct link roads
  • Existing properties along The Northern Road will continue to have left in/left out access until precinct development takes place
  • Nine intersections to be upgraded with new traffic lights
  • Existing bridge over Thompson Creek will be replaced for southbound traffic and a new bridge will be constructed for northbound traffic.

What happens next?

Roads and Maritime is progressing the project with the successful construction tender winner due to be announced in early 2017.

We expect to start construction in mid to late 2017 and open to traffic in mid-2020.

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