A blue Mercedes has crashed into a tree in Horotiu, Waikato leaving the driver with critical injuries.
The car was travelling south along the Great South Road in Horotiu when it collided with a tree at 10:45am on Sunday, police say.
The driver of the car suffered critical injuries while the front seat passenger has moderate injuries.
The road is closed but is expected to reopen shortly and diversions are in place.
Waikato police are appealing for witnesses to contact them with information.