Kwinana Freeway Upgrade

Planning and project development for the upgrade is now underway. Over the next 18 months we will be undertaking:

• Early design development for road, bridge, pedestrian and cycling infrastructure and drainage
• On site investigations, including identifying underground utilities, testing ground conditions and drainage
• Early concept development for urban landscape and design
• Environmental and heritage assessment to inform environmental processes and approvals.
• Procurement planning to prepare the project for construction.

Site investigation nightworks

Geotechnical and service investigations will be undertaken in the coming weeks to inform detailed design and include pavement testing and sampling and underground service locating and scanning.

Mobile work crews will move along Kwinana Freeway (northbound and southbound) between Roe Highway and Mortimer Road to carry out the works at various sites. To ensure safe access to the work sites and reduce disruption for road users, works will take place at night between 9PM – 5AM over a 6-week period commencing Monday, 18 August 2025.

Intermittent disruption and changes to road conditions may be experienced during the works period. We ask that road users plan ahead, follow all road signage, and allow extra time for journeys. Visit our Travel Map for to plan your journey.

Environmental referral

Main Roads has referred the Kwinana Freeway Upgrade project to the Department of Climate Change, Energy, the Environment and Water (DCCEEW).

DCCEEW has published the referral documentation on its website and the public comment period is now open.

The comment period has been extended to close on Monday, 22 September 2025. The project's referral documentation is available for download and submissions can be made through DCCEEW's EPBC Act Public Portal.

At the end of the comment period, the information included in the referral, along with any comments received, will be used to help the Commonwealth decide whether the project is required to be assessed in accordance with the Environment Protection and Biodiversity Conservation Act 1999.

For help with making a submission, visit https://www.dcceew.gov.au/environment/epbc/public-comments or contact DCCEEW at EPBC.Referrals@dcceew.gov.au or 1800 423 135.