For its collective exhibition in April 2009 at "Haus Diagonal" in Zürich's Maag Areal, the GAV class 12.07.zh was tasked to capture visually interesting aspects of Zürich's Hardbrücke, a large and often contested road bridge. At that time, a massive renovation of the heavily used bridge was being planned. The much worn white lines - here presented as tar graffitis - illustrates the necessity of major repairs...