A serious crash has closed North Lake Road northbound at Discovery Drive in Bibra Lake, with motorists urged to find an alternate route.
Main Roads WA reported the crash about 6.15am, with emergency services at the scene and traffic heavy on approach.
Motorists are being told to avoid the area.
A crash on Roe Highway eastbound after Nicholson Road in Langford has left traffic busy on approach, with lane closures yet to be confirmed.
A separate crash on the Mitchell Freeway southbound exit to Burns Beach Road in Joondalup has partially blocked the left-turn lane.
Motorists are urged to slow down and proceed with caution, with people reported outside their vehicles.
