Tonkin Highway Extension

Thomas Road to South Western Highway

In planningFuture

Extend Tonkin Highway an additional 14 kilometres.

Illustration of Tonkin Highway

What's happening

 Online survey now open

An online survey is being run from 25 May to 29 June 2024 to seek feedback from the community on the project and topics of importance during construction.

Click the button below to access the suvey.


 Upcoming community information sessions

Now that the project have moved into procurement, community information sessions are planned to provide an update on project delivery, provide more information on key themes from the 2023 community information sessions, and are an opportunity to ask the delivery team questions. They will be similar to the 2023 drop-in sessions, where people can come and go during the timeslot. There will not be a formal presentation.

The sessions are scheduled for:

  • 25 May 2024, 10am to 12pm, Serpentine Jarrahdale Community Resource Centre, Mundijong
  • 29 May 2024, 5pm to 7pm, Byford Dome first floor

An online survey will be conducted during May and June to provide a further opportunity for people to view the material and have your say.

 Project newsletter

The April 2024 Project Update newsletter is now available which provides a procurement update for the project’s delivery, the upcoming community information sessions, sustainability and noise.

 Delivery Update

Shortlisted contractors can now submit a Request for Proposal (RFP) for Stage One of the project, which will see Tonkin Highway extended from Thomas Road to Mundijong Road, and Thomas Road duplicated from Kargotich Road to South Western Highway.

The shortlisted consortia are made up of the following companies:

  • Tonkin Extend Alliance (Laing O'Rourke, Garli, WSP and Arcadis); and
  • Tonkin Extension Alliance (Georgiou, BMD, Civcon, GHD and BG&E).

An Alliance Contract is expected to be awarded in late 2024.

An Expression of Interest for Stage Two of the project has also been released, which will see Tonkin Highway extended from Mundijong Road to South Western Highway.

Both Stages will be constructed at the same time.

 Read more in the media statement - Tonkin Hwy Extension and Thomas Rd Upgrades continue progress.

 Visualisation Video

A fly-through visualisation video has been produced to show an artistic view of what the Tonkin Highway Extension and Thomas Road Upgrade will look like once complete.


pressure on surrounding roads


travel times


road connectivity

Page last reviewed:  | Last updated: 

Acknowledgement of country

The Government of Western Australia acknowledges the traditional custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders both past and present.

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