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Saukopftunnel remains closed due to safety deficiencies!
Saukopf tunnel remains closed until further notice due to technical defects in the smoke exhaust flaps; Security risks must be addressed.
Saukopftunnel remains closed due to safety deficiencies!
The Saukopf Tunnel between southern Hesse and Baden-Württemberg remains closed, and the reopening originally planned for this Saturday has been postponed due to technical problems. The reason for this is an unexpected defect in the control of the smoke exhaust flaps, which are essential in the event of a fire to remove smoke and fire gases. Currently, more than half of the 36 flaps are not working, which poses a serious safety risk tagesschau.de reported.
The tunnel had been undergoing renovation work since May 19, 2025, which included replacing outdated safety technology. Among other things, the video and fire alarm systems were modernized and the lighting was renewed. This extensive renovation work costs around 3.4 million euros and is covered by the federal government. On July 28, 2025, the tunnel was completely closed due to the pending tests after it was determined that over 50% of the smoke exhaust flaps in the tunnel ceiling could not be controlled rp.baden-wuerttemberg.de supplemented.
Technically complex challenges
The decision to further close the Saukopf Tunnel was made by the Karlsruhe Regional Council and the Rhein-Neckar District. Those responsible are currently working on researching the causes and finding solutions to restore functionality. It is not possible to replace the defective components at short notice, which is why repairs are planned on site. There is currently no binding information regarding the reopening of the tunnel.
Smoke extraction is not just a technical detail, but crucial to the safety technology of the tunnel. The Saukopf tunnel has a total of 36 smoke exhaust flaps that are automatically activated to ensure the safety of road users in an emergency. The latest technology and careful planning are essential, as is generally the case for tunnel projects that also have to ensure stability. This responsibility lies with the structural engineers, who continuously optimize Soyan's performance and safety standards dorsch.com describes.
In the meantime, road users have to take a detour via the B3 and L3408, which results in additional travel times. The current situation represents a significant challenge, especially for commuters. As soon as there is news about the reopening of the Saukopf Tunnel, we will report immediately.