Mount Ousley interchange

Roads and Maritime Services is planning for an interchange on the M1 Princes Motorway at the base of Mount Ousley.

The NSW Government has allocated a further $3 million to continue to plan this project which will improve road safety, travel times and cater for the efficient movement of future traffic and freight growth.

Updates and announcements

September 2018

Roads and Maritime is carrying out investigation work from Monday 24 September as part of preparation work for the Mount Ousley interchange.

Work will take place across an area from Highbank Place to University Avenue, along the M1 Princes Motorway and take up to three months to complete.

Work will be carried out on weekdays between 7am and 6pm, weather permitting. The community will be notified in advance of any work outside these hours.

The majority of the investigation work will be outside of the road corridor and will not affect traffic.

Access to private properties will be maintained at all times. Pedestrian walkways will not be impacted during this work.

Drilling will also take place in the commuter car park on Old Mount Ousley Road which will impact a limited number of parking spaces for up to five days.

Please keep to speed limits and follow the direction of traffic controllers and signs. For the latest traffic updates, you can call 132 701, visit or download the Live Traffic NSW App.

Next Steps

The project has achieved planning approval and the next stage will be to prepare the detailed design for the project. Timing and funding for construction of the interchange upgrade is still to be confirmed.

Artists impression of the proposed interchange.

The project

The proposed interchange would replace the existing intersection, and improve safety, reduce traffic congestion and provide for future traffic growth.

In response to ongoing consultation and investigations, we have continued to improve the design of the proposed interchange.

Key changes since the preferred option include:

  • new northbound exit from the motorway
  • additional heavy vehicle safety ramp
  • finalised commuter car park location with additional parking spaces and improved access
  • extended pedestrian and cyclist connections
  • relocation of the southbound entry to the motorway
  • new service road between Mount Ousley Road and University Avenue
  • closure of the southbound University Avenue exit from the motorway. Motorists would use the Mount Ousley Road exit and the service road.

Key benefits:

  • 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.

Review of Environmental Factors

Roads and Maritime displayed the Review of Environmental Factors and concept design for the Mount Ousley interchange between Thursday 16 November and Friday 15 December 2017. During the display period we received 130 submissions and a total of 236 separate comments. Read what the community had to say on the online tool.

The environmental assessment for the Mount Ousley Interchange is now complete and the Submissions Report has now been published. The report answers questions raised by the community during the consultation period last year and has proposed a few design changes. It also considers additional consultation that took place around noise management during and after construction.

Benefits of this project: Improve pedestrian safety, better and more reliable trips, easing congestion, improving traffic flow.
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