 An environmental assessment for the rail infrastructure begun during the following year; the design reportedly incorporated around 100 km of new track, as well as around 300 switches and crossing.The design of the station included measures to make it both energy-efficient and environmentally friendly; features such as integrated CO2-controlled ventilation and geothermal energy systems have been incorporated, while both the windows and walls are furnished with soundproofing.During June 2007, construction work formally commenced in the form of preliminary works, such as the remodelling of the existing S-Bahn station Südtiroler Platz.