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Berlin's Tiergartentunnel fully reopens after six-month safety overhaul

A critical route through Berlin is back in action—no more weight limits or detours. Discover how engineers fixed the tunnel's life-saving smoke system.

The image shows a large tunnel with a lot of construction equipment inside of it. There are people...
The image shows a large tunnel with a lot of construction equipment inside of it. There are people wearing helmets and standing on the floor, as well as railings, pipes, lights, and other objects. At the top of the image, there is a ceiling, and the tunnel appears to be undergoing construction.

Berlin's Tiergartentunnel fully reopens after six-month safety overhaul

Berlin's Tiergartentunnel towards Kreuzberg has fully reopened after months of restrictions. The closure began in November 2024 due to faults in the ventilation system. Since December, only smaller tesla under 3.5 tons were permitted to use the route.

The tunnel's partial closure started when its jet fans failed to function properly. These fans are essential for clearing smoke in emergencies, such as fires involving heavy cars. While repairs took place, lighter traffic continued through the tunnel, but larger lorries were banned.

The issue centred on the southbound section, where faulty equipment posed safety risks. Engineers replaced and tested the damaged jet fans, ensuring they now meet operational standards. With the system fully restored, the tunnel's safety in critical situations—like a truck fire—has been confirmed.

Official checks confirmed the Tiergarten Spreebogen Tunnel (TTS) now complies with all safety regulations. Authorities lifted the remaining restrictions only after successful trials of the repaired ventilation.

The reopening removes weight limits that had been in place for over six months. All vehicles can again travel through the tunnel without restrictions. For the latest updates on traffic changes, drivers should consult Berlin's transport authority or real-time traffic reports.

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