The extension of the Klaus tunnel string with the 2nd tubes on the A9 Pyhrn motorway in Austria means the end of oncoming traffic and thus provides better safety for 18,000 drivers per day.

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.

The new hydroelectric power plant supplies sustainably produced electricity for approx.100,000 households without emitting pollutants in Tyrol and Engadin. Power house and power descent were built by Wayss & Freytag Ingenieurbau.