500 meters. Being significantly faster than the Semmering line, it would enable a reduction in the travel time between the cities of Vienna and Graz.

The Semmering Base Tunnel has a gradient of 0.84 per cent. This gradient was selected to enable it to be used by heavy freight trains with only a single locomotive. The plan involves several infrastructure changes, such as the integration of the railway stations at Gloggnitz and Mürzzuschlag