A ground-breaking ceremony was held at Gloggnitz on April 25, 2012 to officially launch preliminary construction works for the 27.3 km Semmering Base Tunnel. Opening is planned for 2024. The €3·1bn base tunnel between Gloggnitz and Mürzzuschlag is a key part of the 'new Südbahn' project. It will eliminate the current bottleneck on the 41 km Semmering Railway route where steep gradients and numerous curves require freight trains to use two or three locomotives.