A man is in critical condition after being ejected from his small truck when it hit a car in Wellsford.
The incident happened on State Highway 1, near Wayby Valley Rd, just after 4pm.
Auckland Rescue Helicopter co-pilot Aaron Knight said the man in his 20s suffered head trauma, a fractured leg and collarbone.
"The occupant of the other vehicle was relatively unscathed.
"The weather was pretty treacherous in the area."