Following a busy and congested afternoon, much of Auckland's motorways are starting to declutter in areas.

Motorists on the Northwestern Motorway faced lengthy delays following a crash after the Te Atatu Rd off-ramp but now traffic is easing.

On the Southern Motorway, traffic heading southbound through Greenlane is easing and is slow from Manukau due to an incident near Papakura.

Northbound traffic on the Southwestern Motorway is easing while approaching Neilson St, and southbound traffic is heavy approaching the Southern link.

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Traffic on the Northern Motorway remains heavy for citybound traffic between Esmonde Rd and the Harbour Bridge, meanwhile, northbound traffic is easing.

On the Northwestern Motorway, traffic is heavy westbound but easing between Rosebank Rd and Te Atatu Rd and citybound traffic is queueing at the Southern link.

Elsewhere, services on the Johnsonville Line are currently suspended between Wellington and Johnsonville due to an overhead power outage.

MetLink reports services are being replaced by bus and there is no estimated time on when the power outage will be fixed.