 A few years later, another problem was posed by the construction of the Süd Autobahn (1961-1963), which crosses the first pipeline four times between Bad Vöslau and Bad Fischau.Precautions had to be taken to protect the pipeline from the potential effects of traffic accidents.With the establishment of the Schneealpenstollen (Alpine Snow Tunnel) in 1968, water from Styria was introduced into the pipeline system.