A Chatham woman is accused of being intoxicated Saturday when the van she was driving in Florida veered into oncoming traffic and collided with a motorcycle driven by a North Carolina man who later died, authorities said. Barbara Dunn, 77, was arrested on charges of DUI manslaughter and other related charges and was booked at Volusia County Jail, according to the Florida Highway Patrol. Dunn was driving north on Ocean Shore Boulevard in Ormond Beach at about 9 p.m. when her 2012 Chevrolet van crossed into the southbound lanes, where a group of motorcyclists were traveling, the statement said. A motorcycle driven by Charles Bixler, 64, of Concord, N.C., collided with the van, according to police. Results of Dunn’s blood-alcohol test should be available in eight to 10 weeks, said Highway Patrol Sergeant Kim Montes.