Police have cleared the wreckage of a vehicle rollover on Roe Highway but traffic remains slow through Leeming as congestion eases.

The rollover happened on Roe Highway westbound just after South Street on Sunday morning, with emergency services attending and lane closures put in place.

While the crash has now been cleared, traffic is still slow on approach and motorists are being urged to remain patient as conditions return to normal.

Traffic camera vision showed emergency vehicles surrounding the crash site and vehicles banking up behind the incident.

A separate crash on Wanneroo Road southbound at Golf Links Drive in Carramar has also been cleared.

Ambulance crews and police attended the scene after the left lane was closed but the incident caused no significant traffic delays.