The Voralpen Express (VAE) 2584 of the Südostbahn seems very small on the highest railway bridge of Switzerland, the 99 meter high and 365 meter long huge Sitter viaduct of the former Bodensee-Toggenburg Bahn. The viaduct with a half parabola girder was erected in 1910, when the line from St.Gallen to Wattwil was built, and has a main span of 120 meter and the line has a grade of 1.6 %. The Voralpen Express is a push pull train with railcars RBDe 561 # 082 and 083 and 6 intermediate cars, all in a special paint scheme. Below the bridge is the Kubel hydroelectric power station and the 22 meter long wooden bridge over the Sitter from 1800.
