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 two tunnels. On the Tyrolian side it is built over the Rosanna Gorge before the actual massif rises up in the direction of Vorarlberg over the tunnel.