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Work on the METRONET Thornlie-Cockburn Link is ramping up with preparations underway for the Mandurah Line shutdown.
The Mandurah Line will close from Aubin Grove to Elizabeth Quay stations from 26 December 2021 for a minimum of 20 days.
The shutdown is required to shift the Mandurah Line tracks further apart to enable the new Thornlie-Cockburn Link tracks to be built in between them.
Feedback from a survey of 4,500 Mandurah Line passengers in June is helping shape train replacement services, with detailed information to be released in November.
Some changes along the Kwinana Freeway southbound between Berrigan Drive and Armadale Road are also required to facilitate the shutdown.
From 27 September 2021 to early-2022, speeds will be reduced, and some traffic will be shifted to a new road built alongside the freeway, to allow for works in the rail reserve.
The Berrigan Drive entry ramp to the freeway will also remain closed. Drivers should proceed with caution and adhere to the speed limits and directional signage.
The Thornlie-Cockburn Link will be Perth's first east-west cross line connection, linking the Mandurah and Armadale lines and making travel through the south-eastern suburbs quicker.