Engineers examining why the cracks appeared in the Gotthard Road tunnel are exploring the possibility they could have been caused by the tunnelling for the second tunnel, which is due to open in 2029.
Work on the new tunnel has been suspended.
Last month the existing tunnel was closed briefly after slabs fell from the ceiling.
Experts told the SonntagsZeitung newspaper it may be necessary to increase the distance between the tunnels which would delay the planned opening.
Festive spending will be flat this year
A new Christmas survey suggests festive spending in Switzerland is stagnating for a second year.
Heavy snow coming - in the mountains
We’re facing several days of turbulent weather as a deep Atlantic low moves across Central Europe.
Small retailers urge customers to use cash
Shop keepers in French-speaking Switzerland are pushing back against the rising cost of electronic payments.
Broadcaster to sack 900
The public broadcaster SRG SSR says nearly 900 jobs could disappear by 2029 as part of a major cost-cutting plan.
Lausanne drug area now clear
On the face of it, the new policy at the former drug centre in Lausanne is working, but some fear drug taking has been pushed further underground - and therefore more dangerous – or it’s simply the cold weather.
Tiniest LEDs invented in Zurich
Researchers at ETH Zurich say they’ve built the world’s smallest light-emitting diodes — tiny “nano-OLEDs” so small that a hundred of them could fit across the width of a human cell.
