Kwinana Freeway $700m upgrade: design and capacity notes for project teams
Reviewed by Joe Ashwell
First reported on Roads & Infrastructure (AU)
30 Second Briefing
A CPB Contractors–McConnell Dowell consortium has secured a $700 million design and construction contract to upgrade more than 29 kilometres of Perth’s Kwinana Freeway between Roe Highway and Safety Bay Road, a corridor carrying over 100,000 vehicles on a typical weekday. Works will include additional lanes, interchange modifications and ramp upgrades to increase capacity and reduce bottlenecks on this north–south freight and commuter spine. The project also preserves corridor width and geometry to interface with the planned Westport freight precinct and associated port access links.
Technical Brief
- Freight role of the corridor suggests heavy-vehicle lane configuration and pavement design for high ESA loading.
- Lessons will be relevant to other long linear freeway upgrades needing future-proofing for new port or intermodal links.
Our Take
CPB Contractors also appears in our coverage on the Main South Road Duplication in Adelaide, signalling that it is consolidating a strong position on large-scale urban freeway upgrades across multiple Australian states rather than focusing solely on Western Australia.
The Kwinana Freeway works sit alongside the separate $1.1 billion federal–state road links program for the Westport terminal at Kwinana, suggesting that this corridor is being treated as a strategic freight spine for Perth rather than a stand‑alone commuter route.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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