Bellegarde-sur-Valserine Viaduct, Motorway viaduct in Bellegarde-sur-Valserine, France

The Bellegarde-sur-Valserine Viaduct is a motorway viaduct carrying the A40 at kilometre 97 over the Rhône, between Ain and Haute-Savoie. It is a variable-depth cantilever beam bridge with a box-girder structure, 1,055 metres long with a main span of 130 metres, built between 1980 and 1982.

The viaduct was built between 1980 and 1982 to carry the A40 motorway across the Rhône near Bellegarde-sur-Valserine, linking the Ain and Haute-Savoie departments. It is a cantilever beam bridge of variable depth with a box-girder structure, 1,055 metres long with a main span of 130 metres.

Engineers and architecture students regularly visit the viaduct to study its structural elements and integration with the surrounding mountain landscape.

The viaduct carries the A40 motorway at kilometre point 97, so it cannot be walked or cycled across; drivers cross it between Lyon and Geneva. Views of the 1,055-metre beam span and its 130-metre main span open from the roads around Éloise and Valserhône, near the Rhône crossing between Ain and Haute-Savoie.

The A40 motorway viaduct, built 1980–1982, has a main span of 130 metres and a variable-depth box-girder deck. It crosses the Rhône between the Ain and Haute-Savoie departments, close to the older stone arch bridge visible upstream.