UPDATE: The three crashes have now been cleared.
Traffic may still be slow through some areas.
MORE: Cyclist seriously injured in Champion Lakes crash
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READ NOWMORE: Emergency services at scene of car rollover on Wanneroo Road
EARLIER: THREE early-morning crashes are causing morning traffic havoc across Perth.
A reported three-car crash on the Kwinana Freeway northbound, near Leach Highway in Bateman, has shut down one lane of the freeway.
In Maida Vale, the right lane of Kalamunda Road eastbound has been blocked after a crash.
Drivers are encouraged to avoid the area.
In the northern suburbs, Wanneroo Road has been reduced to a single lane southbound near Balga.
Drivers using Wanneroo Road should take an alternate route.