Viaduc de Nantua

About

The Nantua viaduct is a motorway bridge that allows the A40 motorway to connect Mâcon to Annemasse and then Saint-Gervais-les-Bains by crossing the Nantua valley at the exit of the Chamoise tunnel. The viaduct thus allows you to cross the small river of the Oignin. The first tranche was opened for circulation in 1985, and the second in 1996.