A woman who fell from a moving campervan on the Waikato Expressway was trying to shut a door when wind blew it open, sending her tumbling on to the road.
She remained in Waikato Hospital's Intensive Care Unit in a critical condition this afternoon, a hospital spokeswoman said.
The woman fell on Thursday trying to shut a door.
Waikato road policing manager Inspector Marcus Lynam said it appeared the door of the campervan wasn't closed properly.
"The woman has gone to close it and the wind caught it before she went out the door.
"Speed was not a factor in the incident - you don't have to be going fast for something like that to happen," he said.