The Drackensteiner Hang is a mountainside in the Swabian Alps at Kirchheim unter Teck in Baden-Württemberg, Germany. Bundesautobahn 8 between Stuttgart and Ulm divides into separate northbound and southbound routes on either side of the peak. The two halves of the autobahn each traverse one tunnel and a series of two or three viaducts which were designed by Paul Bonatz and built for the Reichsautobahn; the bridges were all destroyed in World War II and had to be rebuilt, and the route in one direction was only completed in the 1950s. A project to reroute the autobahn with new tunnels and bridges has been postponed indefinitely.
The entire segment is 16 kilometres long. The separated sections, which are some 2 kilometres apart at the furthest and over which the autobahn rises or descends 230 metres , lie between Mühlhausen im Täle and Hohenstadt, where there is an emergency access road. North of Mühlhausen, traffic southbound from Aichelberg, where the first viaduct is located, climbs 200 metres up the north-west-facing slope of the Swabian Alps, known as the Albtrauf, crosses the 500 metres long Mustobel Viaduct and travels a further 7 kilometres through a mountain valley and the valley of the Winkelbach to the upper reaches of the River Fils, descending approximately 50 metres near Gruibingen.
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