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Tonkin Highway Interchanges

Funding Program:Investment Road and Rail Program
Status:Not started
Transport Mode:Road
Estimated Project Cost:$366,000,000
Australian Government Contribution:$183,000,000
Local Council/Shire:City of Gosnells,Shire of Kalamunda

Project Description

The Tonkin Highway, south of Roe Highway, is a primary distributor with two lanes in each direction divided road with at grade intersections. The Tonkin Highway carries a significant amount of freight, which is expected to increase in the future. The project will construct grade separations at Kelvin, Welshpool and Hale Roads, which are the highest priority intersections that require upgrading on the route.


 Improve Freight Efficiency, Connectivity and Travel Time:

  • improve freight efficiency and increase freight network capacity resulting in increased supply chain efficiency
  • improve connectivity between major freight infrastructure including ports, airports and commercial and industrial areas
  • reduce costsfor heavy vehicle operators, companies and commuters as a result of reduced travel time
  • improve road connectivity between current and future residential, business and employment precincts

Improve Local Amenities:

  • shift heavy vehicle traffic away from the suburb of Byford
  • improve road safety and reduce congestion for all road users


The Australian Government has committed $183 million towards the $366 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