During the renovation, one tube of the Rugen tunnel was closed while the other tube accomodated traffic in both directions.
Between 2014 and 2017, the Rugen tunnel was comprehensively renovated. The operating and safety systems as well as the drainage systems were replaced and additional escape routes were installed.
In 2020, anti-recirculation walls were constructed between the tunnel portals on both sides in order to ensure that smoke is prevented from entering the other tube in the event of a fire
In the Lütschinen underpass, in addition to the standard renovation of the concrete structure, measures were taken to enhance fire prevention and the operating and safety systems were upgraded. In addition, a fire escape was constructed as an emergency escape route. Most of the construction work was carried out at night.
Details
- Handover of the Rugen tunnel to traffic: 3 December 1979
- Opening of the Lütschinen underpass: 18 May 1988
- Length: Rugen tunnel 800 metres; Lütschinen underpass 560 metres covered, 180 metres as a gallery
- Duration of renovation work: Spring 2014 until fall 2017
- Costs for renovation / safety installations in Rugen tunnel: Approx. 50 million Swiss francs
- Costs for renovation / safety installations in Lütschinen underpass: Approx. 30 million Swiss francs