No one was injured when a man lost control of his vehicle on State Highway 3 near Turakina on Monday afternoon.
The man told police he had suffered a medical event which led to his car rolling and stopping on a fence about 500 metres from Dudding Lake.
No other vehicles were involved in the accident that occurred at about 3.10pm.
"He was going north, he's drifted into a ditch and then come back across and hit the side," Constable Brett Parkinson said.
.