SOUTH FORSYTH — A single-vehicle wreck Wednesday night on Ga. 400 claimed the life of a 51-year-old Flowery Branch woman.

According to the Forsyth County Sheriff’s office, the crash occurred about 7:40 p.m. near Peachtree Parkway/Exit 13.

Deputy Michael Nelson said Lynn Herman was driving a 2003 Ford Explorer north on Ga. 400 in the inside lane when she left the highway for unknown reasons.

While the cause of the crash remains under investigation, Nelson said it appears Herman over-corrected, causing the sport utility vehicle to roll several times.

The fatality, which was at least the eighth of the year on Forsyth roads and first of the month, occurred about 24 hours prior to the start of the busy July Fourth holiday travel period.

Earlier in the week, the sheriff’s office had begun preparing to provide “high visibility” throughout the county over the 78-hour holiday period, which runs from 6 p.m. Thursday to midnight Monday.

Doug Rainwater, a spokesman for the agency, said in a statement that one of the main goals was to provide “proactive traffic enforcement.”

“We will be placing an emphasis on speed enforcement, aggressive driving, seatbelt law … and child seat restraint compliance,” he said. “Citizens can expect to see safety checkpoints, nighttime seatbelt checks and speed enforcement details.”

Last year’s July Fourth holiday period was largely uneventful, with authorities crediting the soggy weather for keeping crowds and activity down.

That likely won’t be the case this year, with the weather forecast calling for mostly sunny skies, little chance of rain and high temperatures near 90 degrees today through Sunday.

“Our main goal is to keep Forsyth County safe, as always, and especially on holiday weekends when our population grows because of Lake Lanier,” Rainwater said.