International industrial city traffic management service point. Danyang City, Zhenjiang handles the annual ticket for trucks at the traffic management service point of the International Industrial City, which is located on the 3 12 national highway. Danyang, located in the Yangtze River Delta and Shanghai Economic Corridor, is a county-level city in Nanjing metropolitan area, located in the south of Jiangsu Province, and belongs to Taihu Lake Basin.