Additional major works will include the construction of entrances in Gloggnitz and Mürzzuschlag, as well as ventilation shafts at Trattenbach and Sommerau. Substations located at Gloggnitz and Langenwang are intended to be used to supply electricity to the trains that'll run through the Semmering base tunnel. Beyond the tunnel itself, ancillary work involves the construction of two new railway bridges, as well as a new road bridge and an underpass for the B27.