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MIL OSI Translation. Region: Germany / Deutschland –

Source: Swiss Canton of Uri – news in German

October 23, 2020

The closure of Axenstrasse in summer 2019 has significantly reduced air and noise pollution in Sisikon. The Uri Environmental Protection Agency looked closely and measured the difference with and without traffic.

The shock was great when, at the end of July 2019, a large boulder thundered past the road on the Ax. For security reasons, the Axenstrasse between Sisikon and Flüelen had to be closed until mid-September. The traffic on Axenstrasse, normally around 16,000 vehicles per day, stopped from one day to the next. The effects of the road closure were great, on commuters and local businesses, but also on the quality of life and the environment.

The Office for Environmental Protection Uri took the opportunity and carried out an air and noise measurement on Axenstrasse in Sisikon with the support of the Federal Roads Office FEDRO. The measurements took place during the ax closure and continued for a few weeks when the road was reopened to traffic.

The quiet without traffic

The result shows the great impact that through traffic has on the village of Sisikon. During the ax closure, the noise level fell by around 9 dB (A). During this time, there were also more and more quiet phases that were practically without street noise. At night these rest phases lasted up to 30 minutes, during the day it was still quiet for up to 5 minutes. When the Axenstrasse is open, however, there are hardly any quiet moments.

The air pollution was also lower during the ax closure. The nitrogen oxide and soot pollution fell by around 45 – 65%. On the other hand, no effect was found for particulate matter pollution. This is due to the fact that the standard method for fine dust measurement does not capture the very small fine dust from internal combustion engines well enough. Other sources of fine dust such as wood firing therefore determine the measured values. In addition to traffic as an important source of pollutants, air pollution is also determined by the weather and wind.

The results agree well with a comparable measurement campaign that was carried out during the closure of the Gotthard road tunnel in Erstfeld in 2006. It turns out that road traffic still has a significant influence on air quality and the noise situation, even if the emissions of the individual vehicles are steadily falling due to technical progress.

The report can be downloaded from – search for “Axensperrung”.

Inquiries from media representatives: Office for Environmental Protection, Niklas Joos-Widmer, Head of Immission Control Department, Tel. 041 875 24 17, Mobile 079 320 87 65, E-Mail

Office for Environmental Protection, Dr. Alexander Imhof, Head of the Office for Environmental Protection, Tel. 041 875 24 49, Mobile 079 321 98 56, E-Mail

EDITOR’S NOTE: This article is a translation. Apologies should the grammar and / or sentence structure not be perfect.

MIL Translation OSI