Motorway mayhem: Northern Motorway in Auckland clogged following breakdown

NZ Transport Agency reports motorways around Auckland city are starting to swell. Photo / File

The centre lane of Auckland's Northern Motorway heading northbound near the Upper Harbour Highway is blocking and causing major delays.

Congestion is swelling in the area following an incident after the Upper Harbour Highway off-ramp.

NZ Transport Agency reports the incident took place around 4.20pm.

Motorists heading home on the Northern Motorway are asked to pass the incident with care and expect delays.

A crash is also blocking a lane on the Southern Motorway at the Greenlane off-ramp.

SH1 SOUTHERN MWY, SOUTHBOUND - CRASH - 6.10PM
A crash is blocking the left southbound lane prior to the Greenlane off-ramp. Please pass the incident with care and expect some delays. ^MF pic.twitter.com/dWonV0nHWG

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) April 29, 2019

Meanwhile, motorists in Canterbury are being warned about wild weather impacting road conditions.

Heavy rain in the region has caused surface flooding in many places already.

SH1 NORTHERN MWY, NORTHBOUND - INCIDENT - 4.20PM
An incident is BLOCKING the centre northbound lane just after the Upper Harbour Hwy off-ramp. Please pass the incident with care and expect delays. ^MF pic.twitter.com/xZABvnZ8TA

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) April 29, 2019