Northbound delays on motorway at Auckland's Spaghetti Junction

Debris on the motorway near Spaghetti Junction has caused long delays. Photo / NZTA

Northbound traffic on Auckland's Southern Motorway is crawling from Highbrook to the city due to a crash at Spaghetti Junction this afternoon.

The NZ Transport Agency says debris from the crash has been cleared and two northbound lanes are now open, but traffic is still congested from Highbrook.

"Delay your journey, allow extra time or consider alternate route," it advised motorists on Twitter at 4.20pm.

It posted video at 3.50pm showing northbound traffic banked up to Ōtāhuhu.

SH1 SOUTHERN MWY, NORTHBOUND - CRASH DEBRIS UPDATE 3:50PM
Clean-up of debris from an earlier crash continues to block 1 northbound lane (of 2) in Spaghetti Jctn with delays from Princes St to the CBD. Consider alternative route. ^TP pic.twitter.com/tC7F0JnR0z

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) July 24, 2018