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It previously extended into Eau Claire County, but the Eau Claire County section was renumbered Highway 312 as part of the U.S. 53 bypass project in 2006.
China National Highway 312 (312国道), also referred to as Route 312 or The Mother Road, is a key east-west route beginning in Shanghai and ending at Khorgas, Xinjiang in the Ili River valley, on the border with Kazakhstan.