Meanwhile, a reported vehicle fire was partially blocking the left southbound lane just after the Ellerslie Panmure Highway on-ramp on the Southern Motorway at 6.30am.
“Merge with care to pass and expect some delays until cleared,” a statement said.
Another incident was reported just after 6am on SH20 Southwestern Motorway, where a crash was partially blocking the right northbound lane after the Cavendish Rd on-ramp.
The crash was reported at 6.10am and was still blocking the right northbound an hour later, when road authorities said to expect long delays through the area still, as tow services were working to recover the vehicle.
Just before 8am, Waka Kotahi said all northbound lanes on SH20 had been fully cleared, but to allow for extra time due to delays.