Emergency services are responding to a crash that is blocking part of Auckland's Southern Motorway.
The crash is blocking the two right lanes of the motorway just before the Te Irirangi Drive off-ramp, South Auckland.
Motorists are being urged to delay their travel time - or to avoid the motorway entirely.
It is not yet known whether anyone has been injured.
Motorists are being told that vehicle recovery will take "some time" and lanes will therefore remain blocked.
Waka Kotahi NZ Transport Agency issued an alert online just after 9am.
"Delay your journey or consider using SH20 for journeys south or expect long delays through the area."
Just before 9.30am, live traffic maps on Google showed the gridlock was now past Ōtāhuhu.
Waka Kotahi NZTA said the traffic had become heavily congested from Princes St - with queues growing.
Meanwhile, west of the city, the Rosebank Rd off-ramp on the north-western motorway remains closed just before 10am.
Those in the area are told to use the Great North Rd or Te Atatū Rd off-ramps as alternative routes.
The Rosebank Rd off-ramp is currently closed to allow for emergency repairs to a damaged street light nearby.