One northbound lane has since been cleared, while one remains blocked.
Traffic is snarled on Auckland's Southern Motorway for several kilometres following a crash, with queues stretching back to the State Highway 2 interchange. Photo / Google Maps
Police said they were working to clear the remaining blocked lane, and motorists should expect delays travelling northbound.
New Zealand Transport Agency (NZTA) urged motorists to follow the directions of emergency services and allow for extra time to get to their destination.
A traffic flow map shows gridlock from the crash scene stretching back to the SH2 interchange.