Kunstmeile GürtelMischa Kuball addresses the expansion of Otto Wagner's Stadtbahn architecture and uses intense red artificial 'torchlight' to mark a specific segment of the confusing dynamic of flowing traffic and the very different streams of energy relating to it. Urban Light / Stadtlicht sets a definite signal in a diffuse light situation of urban space. This way the subway and city merge at the beginning and end of the Guertel art mall.