The K 36 cantonal road between Schüpfheim, Flühli and Sörenberg is being gradually upgraded and extended. The aim of the overall project is to improve road safety, better protect the road against natural hazards and enhance the region’s accessibility in the long term. The project is divided into three sections.
current measures
Complete closure with diversion in place from 12 October to 6 December 2026
Current journey times between «Chlusbode, Schüpfheim» and «Under Nussberg, Flühli»:
Towards Flühli (ascent):
xx.00 - xx.05
xx.21 - xx.25
xx.39 - xx.45
Towards Schüpfheim (downhill):
xx.10 - xx.16
xx.30 - xx.34
xx.50 - xx.55
Due to the tightly scheduled green phases, there will be changes to some of the services on bus route 241 (Schüpfheim – Flühli – Sörenberg). Please refer to the information provided by PostAuto AG regarding the revised timetables:
postauto.ch/de/fahrplan
Project Section 1 – Chlusboden
The first section, between Chlusboden and Under Lammberg, was upgraded between 2022 and 2025. The road was widened, the alignment improved and a new bridge over the Waldemme was built. The works have been completed.
Project section 2 – Lammschlucht
In the second section between Under Lammberg and Under Tendli, the road will be widened and straightened. In addition, slopes will be stabilised and existing structures will be renovated or replaced. The main works are scheduled to begin in 2027 and are expected to last until 2029. Traffic disruption and temporary closures are to be expected during the construction period.
Project section 3 – Open stretch
The third section, between Under Tendli and Hinder Lamm, completes the upgrade of the cantonal road. The focus is on improving road safety and protection against natural hazards. This section is planned for the long term; a specific implementation date has not yet been set.
Outlook for the remaining construction work
Following the current full closure from 12 October to 6 December 2026, the cantonal road will once again be open to traffic on two lanes during the winter months.
In the springs of 2027 and 2028, further full closures are planned, each running from mid-April to early July, with traffic diverted via the old Flühlistrasse. Construction work on the second phase of the project is expected to last until 2029. The final resurfacing work is scheduled for 2030.
The exact dates and up-to-date traffic information are published on an ongoing basis by the Canton of Lucerne.