The 8.8 kilometer long twin-tube Bossler Tunnel is being built under the Swabian Alb on the new Stuttgart-Ulm line. It is the railway tunnel with the largest diameter ever excavated with mechanized tunnelling in Germany and the longest tunnel structure on the new line.
The new line provides faster connections for the regional and national transport of passengers and goods by rail. Both tubes of the Bossler tunnel are being excavated by an EPB Shield from Herrenknecht. The TBM is installing around 60,000 segments with an outside diameter of 10,940 millimeters and a width of 2,000 millimeters.
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