This online workshop will explore different energy efficient solutions developed in metro stations, focusing on energy monitoring tools. During the webinar participants will have the opportunity to have a look at the solution (a foil-based photovoltaic system on the roof of the Ottraking metro station) carried out by Wiener Linien within the Interreg EfficienCE project through a virtual site visit. Among others, Eberhard Nickel from Leipzigs public transportation service will report on rail bound energy audit and performance measurement in Leipzig.