News

The Zurich Northern Bypass is one of the busiest sections of motorway in Switzerland and is reaching its capacity limits. An expansion of the Northern bypass and the construction of a third tunnel tube in the Gubrist Tunnel shall accommodate increased traffic volumes. The third tube has now been opened and traffic is travelling through this new third tube of the Gubrist Tunnel.

Together with WSP Ingenieure AG and Amberg Engineering, ILF is in charge of the tunnel ventilation and thus plays a major role in the expansion of the Zurich Northern Bypass. Tunnel ventilation is a key safety component in a road tunnel and allows tunnel users to escape safely from the tunnel in the event of a fire. The tunnel ventilation system in the third tube of the Gubrist Tunnel consists of 4 exhaust air fans, 34 dampers, 12 jet fans, various ventilation sensors, 179 control cabinets and more than 80 km of cable.

With the completion of the new third tube, refurbishment of the two old tunnel tubes of the Gubrist Tunnel can now start.