Department of Infrastructure, Transport, Regional Development, Communications and the Arts

Thomas Road Upgrade

Funding Program:Investment Road and Rail Program
Status:Under construction
Transport Mode:Road
Expected Start/Finish:Early 2022 - Mid 2023
Estimated Project Cost:$38,000,000
Australian Government Contribution:$19,000,000
Local Council/Shire:Shire of Serpentine Jarrahdale

Project Description

This project will duplicate Thomas Road near Kwinana Freeway, and construct a new roundabout servicing the development sites on both sides of the road. The remaining single carriageway section of Thomas Road will be upgraded, along with the Kargotich Road intersection and other priority sections along Thomas Road.

This project will complement related projects in the area, including the Tonkin Highway Stage 3 Extension and the Thomas Road - Dual Carriageway South Western Highway to Tonkin Highway Upgrade, by removing merge points along Thomas Road and reducing congestion bottlenecks.


  • Improve road safety for all road users
  • Reduce congestion and improve travel times
  • Improve efficiency and network reliability
  • Improve accessibility and connectivity of road networks


The Australian Government has committed $19 million towards the project.


Construction is currently underway and is scheduled to be completed by mid 2023.

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: 27/06/2022