Photos posted to social media by the NZ Transport Agency show a large truck carrying building materials and a sedan facing sideways across the lanes. The crash also involves a van.
The NZ Transport Agency advised motorists to pass with care and expect residual delays.
Meanwhile, due to a potential overheight vehicle, the northbound Waterview Tunnel was temporarily closed but has since reopened.
A truck lost its load on the same side of the tunnel a short while later and brought traffic to a halt once again at 9.20am. The incident was quickly cleared but residual delays are to be expected.