A witness to the crash that killed Allan Hubbard has told a court he saw the car the Canterbury businessman was in drift into the oncoming lane before colliding with a four-wheel-drive.
Andy Earl from Mosgiel has pleaded not guilty to charges of careless driving causing death and careless driving causing injury to Mr Hubbard's wife, Jean, who was driving.
Witness Cain Lindegreen said there is an image stuck in his head of the Hubbards' vehicle about three quarters across the centre line.
Mr Lindegreen said he saw Mr Earl's red utility vehicle holding its position in the correct lane.
He said when the two cars collided, the Hubbards' white Honda Jazz flipped horizontally several times and Mr Earl's ute span across the road.
On Tuesday, another witness, Derek Gee, said he saw Andy Earl's vehicle cross fully over the centre line moments before the crash.
The hearing before Judge Gary MacAskill is taking place in the Oamaru District Court, which is sitting in Timaru.
