The A8 between Spiez and Interlaken-West will undergo renovation work, starting around 2032. In order to optimise the progress of the work, certain tasks that do not require public consultation will be carried out before the renovation project begins. From mid-January to the end of May 2026, various electronic operating and safety equipment in the Leissigen tunnel will be replaced or renovated. The tunnel lighting will be replaced, new traffic surveillance cameras will be installed and the ventilation control system will be renewed. The power supply and communication systems will also be upgraded. Since the beginning of March, structural measures have also been carried out at the tunnel portals and at the Leissigen-West exit. The supporting structure of the exit has suffered some damage and is therefore being repaired before the actual maintenance project begins. Various concrete works are being carried out on the portals of the Leissigen tunnel. For reasons of space and safety, this work can only be carried out in the closed tunnel. As with the renovation of the A8 at Lake Brienz, the Leissigen tunnel will be closed at night and reopened in the morning so that the national road is accessible to traffic during the day. The closures are planned as follows:
- 02.03.2026 – 29.05.2026, five nights per week from Monday/Tuesday to Friday/Saturday, 8 p.m. to 5 a.m.: closure of the Leissigen tunnel in both directions
During the closures, traffic will be diverted via the cantonal road through Leissigen.
A8 Interlaken-Ost – Brienz
The A8 between Interlaken-Ost and Brienz has been completely renovated between 2021 and 2025. The last night closure took place in the night of 8/9 May 2025. Night closures were again necessary in autumn 2025 to make adjustments to the electrical equipment. This work was completed at the beginning of December 2025. Only the Glooten rest area is still closed. It will reopen in early 2026. As soon as the exact date is confirmed, it will be communicated here.