Each year, thousands of motorcyclists travel to Tennessee to ride “The Tail of the Dragon.” The Dragon, as it is commonly called, is a stretch of U.S. Highway 129 that runs from the intersection of Highway 72 outside Maryville, Tenn., through the Great Smoky Mountains into Deals Gap, N.C. The 11-mile stretch of road boasts 318 curves — a motorcyclist’s…