SEVERAL milestones have been achieved recently in the Mitchell Freeway extension project.
This includes the installation of bridge beams at the Hester Avenue and Neerabup Road freeway interchanges, where two 500-tonne cranes lifted 90-tonne precast concrete beams into position.
Beams for the Burns Beach Road bridge are expected to be installed by September.
Significant work has begun on the pedestrian underpass at Currambine Station and construction will start soon on the principal shared path.
Concrete panel noise walls have been finished along the west side of the freeway alignment, with work on walls south of Burns Beach Road and on the east site to be completed next.
A northbound carriageway has been built on Wanneroo Road and construction is continuing on the intersection with Neerabup Road and Flynn Drive, as well as installing three fauna underpasses.
In a WA-first trial, crushed glass is being incorporated into the road sub-base along a 100m strip of Wanneroo Road.
It will use a 15 per cent mix of glass fines, which are glass portions unsuitable for remanufacturing created during the recycling process.
Mains Roads said the trial would enable the project to achieve a design and construction accreditation from the Infrastructure Sustainability Council of Australia.