The crack in the Gotthard Road Tunnel that appeared on Sunday - leading to its closure - has been confirmed as caused by "redistribution of tension" within the rock above the structure.
Bern ruled out any reason linked to the ageing of the tunnel.
Part of the false ceiling had already suffered similar damage in 1985 - just five years after the tunnel opened.
Swiss Transport Minister Albert Rösti expects the tunnel to be open again by the end of the week at the latest.
Heavy snow causes chaos
Heavy snowfall across central parts of the country brought chaos, cancelled trains, blocked roads and children building snowmen on the autoroute.
Geneva car tax issue dominates Grand Council
Although it wasn’t on the agenda for last night’s meeting of the Geneva Grand Council, the issue of the new vehicle tax dominated proceedings.
Franc strongest against euro
It’s good news for cross border shopping and frontaliers – the franc has reached its highest level against the Euro.
SRG/SSR faces massive cuts
Are the days numbered for public service broadcasting?
People now back nuclear power
A new survey suggests public opinion towards nuclear power has changed dramatically.
4m e-vignettes sold
Four million people last year chose to forgo the sticky mess of a vignette on their car and bought an electronic one instead.
