A vehicle rolled on to its roof in a forestry block on the North Bank on Friday, police say.
Constable Andrew Holdaway, of Blenheim, said the driver and his passenger were able to get themselves out of the vehicle and were treated for minor injuries at Wairau Hospital, in Blenheim.
Police are investigating the cause of the accident.
Alcohol was believed to be a factor, Mr Holdaway said.
Another vehicle rolled and came to rest in the middle of the road near Renwick on Monday morning.
The accident happened about 6.30am, six kilometres north of Renwick on State Highway 6, Mr Holdaway said.
The driver of the vehicle was not injured, but the road was blocked until the vehicle was removed.
- The Marlborough Express