The Cize–Bolozon viaduct is a combination rail and vehicular viaduct crossing the Ain gorge in France. It is a structure that connects the communes of Cize and Bolozon in the Ain département. In 1875, an original span built in the same location but was destroyed later in World War II. The viaduct was reconstructed as an urgent post-war project due to its position on a main line to Paris.Wikipedia