Mount Ousley interchange


Project overview

Transport for NSW is building an interchange on the M1 Princes Motorway at the base of Mount Ousley.

Mount Ousley Interchange concept proposal

The interchange will replace the existing intersection of the Princes Motorway and Mount Ousley Road, bringing greater connectivity, safety and efficiency to those travelling through the gateway to Wollongong.

Latest news

Nov 2022 – Find out more about the Mount Ousley interchange

Over the coming months, contractors will be preparing tender submissions for the detailed design and construction of the project. Once a contractor has been chosen, they will finalise the detailed design and start site establishment activities.

Relocation of utility services will start in early 2023 and major construction is expected to start in 2024.

Listen on YouTube or read our latest project update (PDF, 1.73Mb).

Take a look at our overview map (PDF, 999Kb) or read what our project manager had to say about how this project will benefit you.

May 2022 – Frequently asked questions

For more information about the Mount Ousley interchange, take a look at our frequently asked questions.

Jun 2021 – Mount Ousley interchange progresses

The Australian Government has committed $240 million and the NSW Government has committed $60 million to build the Mount Ousley interchange.

We are carrying out preparation work including utility service investigations, further environmental assessment and property acquisition.

The interchange will replace the existing intersection of the Princes Motorway and Mount Ousley Road, which currently experiences long queues and delays during peak periods.

This project will improve safety for both light and heavy vehicles, provide for future traffic growth, improve access and travel time to and from the Princes Motorway and the Wollongong CBD and increase safety for both light and heavy vehicles.

The community will be kept informed of progress.

Project documents

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Project information


The Mount Ousley interchange project will replace the existing intersection of the Princes Motorway and Mount Ousley Road, improve road safety, travel times and accommodate the efficient movement of future traffic and freight growth.

This project is jointly funded by the Australian and NSW Governments.


  • improved travel times
  • safer access to and from the motorway to Mount Ousley Road
  • improved access to the Wollongong CBD and University of Wollongong
  • improved safety by separating cars and heavy vehicles travelling down Mount Ousley
  • improved amenity for pedestrians and cyclists
  • reduced vehicle operating costs
  • provides for future traffic growth.


  • heavy vehicle only bypass lanes for southbound travel, separating cars and heavy vehicles
  • two new heavy vehicle safety ramps
  • new commuter car park with additional parking space and improved incident response facility
  • new southbound service road between Mount Ousley Road and University Avenue
  • upgrades and widening of the existing pedestrian bridge over the motorway at Northfields Avenue
  • new pedestrian and cyclist bridge over Mount Ousley Road
  • two new roundabouts and a bridge over the motorway for improved access between Mount Ousley Road, Princes Motorway and University of Wollongong
  • improved pedestrian and cyclist connectivity on existing shared paths
  • five metre noise walls along the northern side of the motorway and the southern side of Dumfries Avenue; and along the southern side of the motorway and northern side of Falder Place
  • three and a half metre noise wall along the southern side of Mount Ousley Road, between Gowan Brae Avenue and the cul-de-sac at the western end.

Review of Environmental Factors

Transport for NSW displayed the Review of Environmental Factors (PDF, 7.27Mb) and concept design (PDF, 958Kb) for the Mount Ousley interchange between Thursday 16 November and Friday 15 December 2017. During the display we received 130 submissions and a total of 236 separate comments.

The environmental assessment for the Mount Ousley interchange is now complete and the Submissions Report was published in April 2018. The report addresses questions raised by the community during the consultation period in 2017.

An addendum review of environmental factors (PDF, 37.8Mb) has been prepared to document the potential environmental impacts of the additional utility works outside the original REF proposal area.

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Community information

Community updates

Overview map

Freight updates

  • Freight Facts
    Road freight on Picton Road and M1 Princes Motorway at Mount Ousley


Submissions report

Review of Environmental Factors report

Preferred option report

Feature story

M1 Princes Motorway, Mount Ousley looking south

M1 Princes Motorway, Mount Ousley looking south.

The countdown is on to the start of work on the Mount Ousley interchange with utility work starting in the next few months.

Work will include the relocation and installation of water, gas, telecommunications and electrical services and will bring the project one step closer to major construction in 2024.

Project Manager Warren Blacka said the Mount Ousley interchange will transform the gateway to Wollongong and will have big benefits for the local community.

"Part of the benefit of the project is it will improve access to the Wollongong CBD, the University of Wollongong and improved movements for freight and vehicles travelling both north and south," Mr Blacka said.

The project will improve safety by separating the interaction with cars and heavy vehicles travelling south and replace the existing intersection of the M1 Princes Motorway and Mount Ousley Road, making driving safer with smoother flowing traffic.

"Not only will the project provide upgrades in road safety but the project will improve connectivity for pedestrians and cyclists with a new bridge providing east-west connection over the motorway," said Mr Blacka.

We will build a new pedestrian bridge over Mount Ousley Road and an extension at the existing pedestrian bridge at Northfields Avenue.

We have been working closely with the community and our major stakeholders for many years during the development of the project.

"We live and work in these communities so it is important, we as a community see the benefits to infrastructure projects such as these and it is also important our community feel educated and informed about the project and the associated impacts."

As part of the project a new commuter car park will be built and relocated to the southern side of the motorway with additional parking spaces and an improved traffic incident response facility.

The right turn northbound from Mount Ousley Road that crosses the southbound lanes is a high accident area and will be removed as part of the project.The M1 Princes Motorway is the main southern corridor for freight heading to and from the ports, improving efficiency through this area will support future growth of the sector.

Media releases

Contact us

For further information about this project, please contact:

Phone: 1800 792 918


Mail: Mount Ousley interchange, PO Box 477 Wollongong NSW 2520