A truck and trailer is blocking both north and southbound lanes of the Waikato Expressway following a crash that scattered debris across most of the motorway.
Meanwhile, a person was critically injured in a serious crash in the Auckland suburb of Glen Eden that was also causing delays for motorists.
Northbound and southbound lanes are closed at the State Highway 1 crash near Paddy Rd, Rangiriri and motorists are being asked to avoid the area if possible.