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Tonkin Highway Stage 3 Extension

Funding Program:Investment Road and Rail Program
Status:Not started
Transport Mode:Road
Estimated Project Cost:$505,000,000
Australian Government Contribution:$252,500,000
Local Council/Shire:Shire of Serpentine Jarrahdale

Project Description

The Tonkin Highway is a 45km north-south highway connecting Reid Highway to Thomas Road, Oakford. It connects the south-east corridor with the north-west and north-east corridors of the Perth metropolitan area. The project will extend the Tonkin Highway from Thomas Road to the South Western Highway including at grade separations at Thomas, Orton, and Mundijong Roads and South Western Highway and a grade separated interchange at Bishop Road.


Improve Efficiency, Connectivity and Travel Time:

  • reduce costs for heavy vehicle operators, companies and commuters as a result of reduced travel time
  • improve freight productivity and alleviate traffic pressure on the existing road network
  • improve road connectivity between current and future residential, business and employment precincts

Improve Local Amenities:

  • improve travel times and road safety for all road users


The Australian Government has committed $252.5 million towards the $505 million project.


The project is in planning.

Disclaimer: The material contained in this site is made available on the understanding that the Department is not thereby engaged in rendering professional advice for a particular purpose. Before relying on the material in any important matter, users should carefully evaluate the accuracy, completeness and relevance of the information for their purposes and should obtain appropriate professional advice relevant to their particular circumstances.

Project details last updated: 24/09/2018