 The line opened in 1872, during the opening period of the Vorarlberg Railway, and was electrified in 1926.It is served by some pairs of regional trains and buses and by some international trains (EuroCity, InterCity, and Railjets) that are non-stop between Feldkirch and Buchs.In June 2008 the Canton of St. Gallen, the Federal State of Vorarlberg, and the Principality of Liechtenstein signed an agreement for a project to upgrade the line (and the surrounding ones) and to increase the rail traffic.