Leach Highway and Welshpool Road Interchange

Under constructionUnder Construction

Construction has started on the new interchange to improve safety and efficiency at one of Perth’s most congested intersections.

What’s happening

We are making good progress, with both new bridges on Leach Highway now open to traffic.

Traffic was switched on to a duplicate bridge over the Armadale rail line mid-August, with traffic using two southbound lanes. The switch will allow work to be carried out in stages on the existing bridge, which will be upgraded to meet current standards.

Please view our latest Construction Update for more information on how the project is meeting its tree planting commitment and doing its bit to redirect waste from landfill.

Leach Highway and Welshpool Road Interchange - Planting sedges with St Nortberts College


traffic flow


travel time



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The Government of Western Australia acknowledges the traditional custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders both past and present.

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