Tonkin Highway Extension

Thomas Road to South Western Highway

Planning and development is underway to extend Tonkin Highway to South Western Highway. That's 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;
  • new intersections to be constructed at Thomas Road, Orton Road, Bishop Road, Mundijong Road and South Western Highway;
  • bridges over the existing freight rail line and Perth to Bunbury passenger rail line;
  • 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

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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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