A police spokeswoman said emergency services were called to the crash on State Highway 1 north of Dunedin at 4.30pm yesterday and one person suffered serious injuries.
Senior Sergeant Craig Dinnissen, of Dunedin, said the 69-year-old man was traveling north on SH1 just south of Waikouaiti when he lost control on a sharp corner and collided with a guard barrier, then slid across the ground.
The man was taken to Dunedin Hospital by ambulance in serious condition and then was transported to a Christchurch hospital by helicopter for further medical treatment.