The victim in a traffic collision on Fairfield Road was identified as Robert Dean Williams, 53, Richland County Coroner Gary Watts said Monday.
Williams had no permanent address in the Columbia area but had family in Great Falls, Watts said.
The incident happened Saturday around 11:45 p.m. in the 8200 block of Fairfield Road.
Williams was the driver and only occupant of a 1977 Toyota pick-up that struck another vehicle after appearing to cross the center line, Watts said.
Tests are being done following an autopsy to determine what might have caused Williams to cross the center line, he said.