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Leach Highway and Welshpool Road Interchange upgrades



  • Road

    Project type
  • $93 million

    Total budget
  • In Planning

    Project phase
  • Main Roads WA

    Lead agency
  • 600

    Jobs supported

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

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

There will also be a shared path for cyclists and pedestrians along Leach Highway from Sevenoaks Street to Orrong Road, including over the Armadale rail line.


  • Improved traffic flow
  • Significantly improve travel times and safety
  • Create local jobs and contract opportunities

Project map

This map shows an aerial view of the project location
Project work area

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