Dixon, 56, was driving about a mile north of the St. Marys River when his Dodge Ram 3500 pickup truck went into the emergency lane next to the center median, state patrol Operator Steve Drury said.
There the truck began spinning out of control and spun back across all three northbound lanes before leaving the highway on the east shoulder and overturning, Drury said.
The truck had traveled about 510 feet when it began rolling and ejected Dixon before its top hit a tree.
Dixon, who was not wearing a safety belt, was taken to Southeast Georgia Hospital’s Camden hospital.
Drury said the accident report did not reflect whether Dixon was dead at the scene or died at the hospital. The report said that the roadway was dry.
Dixon took office in 1986, just four years after his father, Sammy Dixon, died in a one-car crash in 1982. Sammy Dixon had been elected mayor and had been in office only three weeks when he was killed.