The Arlberg Road Tunnel with a length of almost 14 kilometers is both, the longest road tunnel in Austria as well as the most important east to west connection between Tyrol and Vorarlberg. Built between 1974 and 1978 and after being in service for almost 40 years the tunnel is currently undergoing a major renovation program. This includes construction of additional emergency bays, emergency galleries, caverns for new electrical equipment and a complete replacement of the electromechanical equipment.
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