A southbound crash on Transmission Gully’s Wainui Saddle has been cleared.
New Zealand Transport Agency Waka Kotahi (NZTA) reported the crash was blocking part of State Highway 1, north of Wellington, at 12.30pm.
A police spokesman said a single car had spun out and there were no injuries.
Motorists returning to main centres from holiday spots today have been told to expect congestion at known choke points.
The Labour Weekend road toll is currently zero.
Earlier this morning, a serious crash in Helensville, 40km northwest of Auckland city, closed State Highway 16.
The two-car crash happened at the intersection of SH16 and Wharepapa Rd and was reported to police at 7.25am.
One person was seriously injured and another had moderate injuries, a police spokesman said.
Detours were put in place and police asked motorists to follow the signage in the area.
NZTA said the road was closed between Kiwitahi Rd and Puriri St.
Southbound traffic was diverted on to Puriri St, Garfield Rd, Old North Rd and Kiwitahi Rd and northbound traffic was put on the same route in reverse.
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Three of the whales succumbed on the shore.