Arlberg () is a massif between Vorarlberg and Tyrol in Austria. The highest peak is the Valluga at . The name Arlberg derives from the tradition of the "Arlenburg", who are said to have once established themselves on the Tyrolean side of the Arlberg passes (1,793 m above sea level). Another story derives the name from the "Arlenbushes" that are very numerous there. Ski resorts at the Arlberg include Lech, Zürs, Stuben, St. Christoph, St. Anton, Oberlech, Stubenbach, Zug, Warth The name of the state of Vorarlberg is derived from the mountain Arlberg, which is located in front of the Arlberg, from the point of view of the Holy Roman Empire as well as the Swiss Confederation and the castle of the Habsburgs. Geography The Arlberg connects the Klostertal Valley in the west with the Stanzer Valley in the east. Together with the Flexenpass, it borders three mountain groups: the Verwall in the south, the Lechquellen mountains in the northwest, and the Lechtal Alps in the northeast. The Valluga, which stands as the highest mountain of the Arlberg, and the Trittkopf, southwest of the Lechtal Alps, dominate the pass. Four communities meet: on the Vorarlberg side, Lech and Klösterle–Stuben; on the Tyrol side, Kaisers and St. Anton. The watershed between the Rhine and the Danube rivers runs south from the Albonagrat to the Passhöhe, over the Valluga and Trittkopf, to the Flexenpass, and it traces from the Flexenspitz the southern edge of the Lechquellen mountains westward to the Klostertal. Pass roads and the Arlberg tunnel The old pass route was known since the 14th century in the form of a narrow mule track when people began to trade salt in the region. However, because the Arlberg was very poorly developed, for centuries people avoided the route and took detours over the Fern Pass or Immenstadt for trading. The development of the textile industry and of the postal service, however, led to the roads being surfaced in 1824. With the rise of motor traffic in the 20th century, however, this became inadequate. It was decided that a Arlberg Road Tunnel would be built between Langen and St. Anton. On July 5, 1974, the work began and the passage was opened to traffic on December 1, 1978. The tunnel has a toll; however, the old road over the pass is toll-free. A peculiarity of the tunnel is that it actually consists of