Berlin, January 21, 2026 – The Waisentunnel, a critical section of Berlin’s U-Bahn network that has been closed for eight years, is finally slated for reconstruction. Construction work is expected to begin in the spring of 2026, following the recent approval of the planning application. This development marks a significant step towards resolving long-standing operational challenges for the Berliner Verkehrsbetriebe (BVG).
Crucial Connection for U-Bahn Operations
The over 100-year-old tunnel, located beneath the Spree in the Mitte district, historically connected the U5 line with the broader U-Bahn network. It served as a vital link for trains needing to access the Friedrichsfelde maintenance workshop. Its closure has forced the BVG to resort to complex and time-consuming alternative methods for transporting U-Bahn cars.
Currently, for any maintenance or workshop visits, U-Bahn trains must be laboriously transported through the city, car by car, on low-loaders. This arduous process has been a major logistical challenge and a considerable drain on resources. The reconstruction of the Waisentunnel is expected to alleviate these issues significantly, making maintenance operations much more efficient.
Reconstruction Details and Timeline
The reconstruction project involves dismantling the old tunnel and constructing a new one in two phases. The new structure will feature reinforced concrete bulkheads, massive partition walls designed to separate the construction site from the operational parts of the network and prevent water ingress into the still-used tunnel sections. This measure ensures that shipping traffic on the Spree will not be affected during the construction period.
While the start of construction is scheduled for spring 2026, the entire project is not expected to be completed until 2030. This timeline underscores the complexity and scale of the undertaking, which aims to restore a crucial piece of Berlin’s public transport infrastructure to full functionality.
Impact on Berlin’s Public Transport
The reopening of the Waisentunnel is anticipated to have a positive impact on the efficiency and reliability of Berlin’s U-Bahn system. By re-establishing a direct connection for train movements, the BVG will be able to manage its fleet more effectively, potentially leading to improved service for passengers.
The eight-year closure of the tunnel has highlighted its indispensable role in the smooth functioning of the U-Bahn network. Its reconstruction is therefore a welcome development for both the BVG and the millions of commuters who rely on Berlin’s public transport system daily.
