A crash on Kwinana Freeway northbound at Leach Highway, Bateman has been cleared but traffic remains heavy.
Traffic is backed up to Berrigan Drive and is moving slowly.
Construction work will also cause disturbances around Mitchell Freeway on Thursday morning.
Powis Street entry ramp to Mitchell Freeway southbound will be closed from Wednesday, June 26 8pm to 5am (Thursday morning).
Detours are in place.
Whitfords Avenue entry to Mitchell Freeway southbound will also be closed on Wednesday, June 26 between 10am and 2pm.
Detours are in place.