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Leach Highway and Welshpool Road Interchange upgrades



  • Road

    Project type
  • $160 million

    Total budget
  • Complete

    Project phase
  • Main Roads WA

    Lead agency
  • 600

    Jobs supported

This project involved upgrading the intersection of Leach Highway and Welshpool Road, currently one of Perth’s most congested intersections.

Constructions works included a grade-separated interchange at the intersection with a new road bridge installed at Leach Highway over the Armadale/Thornlie rail line.

There is also be a shared path for cyclists and pedestrians. 

The project supports the east-west freight link connecting Fremantle with the Kewdale and Welshpool industrial area.


  • Improved traffic flow and efficiency
  • Significantly reduced travel times and improved road safety
  • Create local jobs and contract opportunities

Project map

This map shows an aerial view of the project location.

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