Police have named the man who was killed when his car crashed through a barrier near Palmerston North on Sunday.

Palmerston North student Nicholas Michael Green, 24, died in the single-vehicle crash on State Highway 57 at Kahuterawa, near Linton, about 2.30am.

Early indications were that speed was a factor, police said.

The crash was one of three fatal single-vehicle crashes at the weekend.

Hayden Craig Penman, 32, died after his car left the road and smashed into a tree near Murchison on Sunday, while Francis Joseph (Harry) O'Boyle, 70, died in hospital early Saturday after crashing on the Hororata-Dunsandel Road, west of Christchurch, on Friday night.