Northbound queues are stretching about 15km back to Mana and southbound queues reached the Raumati straights.
"Please delay your journey north or expect significant delays," NZTA said on Twitter.
UPDATE 3:10PM SH1 north of Paekākāriki is open to one lane with emergency services managing traffic. Northbound queues are back to Pukerua Bay with southbound queues sitting at Mackays Crossing. Please delay your journey north or expect SIGNIFICANT DELAYS. https://t.co/cAhLEfFw9m
— Waka Kotahi NZTA Wellington (@WakaKotahiWgtn) October 6, 2020