Emergency services are attending an incident on the Northern Motorway just past the Auckland Harbour Bridge.
Police confirmed a vehicle breakdown was blocking a lane between the Stafford Rd on-ramp and Onewa Rd off-ramp at 10.43am.
Motorists in the northbound motorway lanes faced lengthy delays, which have now cleared.
NZTAsaid traffic was also heavy due to an event in the area.
SH1 AKL NORTHERN MWY, NORTHBOUND - CONGESTION - 11:35AM Due to an event from Northcote to Silverdale, Traffic is currently busy northbound on SH1 between Tristram Ave to Greville Rd. Please expect delays and allow extra time for their journeys. ^EH pic.twitter.com/ga1ZHCBtiW
— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) February 29, 2020