Tonkin Highway Extension

Thomas Road to South Western Highway

Planning and development is underway to extend Tonkin Highway to South Western Highway an additional 14 kilometres.
Tonkin Highway intersection

We are extending Tonkin Highway – creating a high standard north-south transport link in Perth’s south eastern corridor.

A reservation for the road extension has been included in the Metropolitan Region Scheme (MRS) for a number of years.

Preliminary concept 

The project proposes to extend the highway from Thomas Road, Oakford to South Western Highway, south-east of Mundijong.

The preliminary concept includes:

  • approximately 14 kilometres of four lane dual carriageway;
  • upgrade of intersection at Thomas Road/Tonkin Highway;
  • new intersections to be constructed at Orton Road, Mundijong Road and South Western Highway;
  • new grade separated interchange to be constructed at Bishop Road;
  • bridges over the existing freight rail line and Perth to Bunbury passenger rail line and Wright Road;
  • a shared use path along the eastern side of the Tonkin Highway corridor, with planned connections to local path networks; and
  • an equine and pedestrian / cyclist underpass under Tonkin Highway at Abernethy Road.

Alleviate pressure on the transport network

Reduce travel times

Improve safety and connectivity

Tonkin Highway Extension map June 2021.jpg
Click image to enlarge (PDF)

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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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