Skip to main content


Leach Highway and Welshpool Road Interchange upgrades



  • Road

    Project type
  • $136 million

    Total budget
  • Under Construction

    Project phase
  • Main Roads WA

    Lead agency
  • 600

    Jobs supported
  • Mid 2021

    Start date

    Early 2023

    End date

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

Constructions works 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. 

The project will also support 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.
Project work area

Plan your journey

Avoid disruptions to your journey and plan your trip