While investigating on the trail of the beginnings of the universe – in the nuclear research centre CERN the quarks go to the racecourse. The tunnels and caverns for the biggest machine in the world were built by Wayss & Freytag Ingenieurbau.

Rehabilitation of the head race tunnel with downstream access tunnel and bypass tunnel

Due to an advantageous layout of tunnel portal and tunnel excavator is was possible to do without shunting bays and laborious shunting during the construction of the single-track railway tunnel.