 The current "Schnellstraßen" system has a total length of .As they fit better with the mountainous topography of Austria, "Schnellstraßen" often serve as an autobahn substitute.For example, the main link between the Austria's westernmost state of Vorarlberg and adjacent Tyrol is entirely provided by the "S16 Arlberg Schnellstraße", including the Arlberg Road Tunnel completed in 1979.