cf. city flows is a comparative visualization environment of urban bike mobility designed to help citizens casually analyze three bike-sharing systems in the context of a public exhibition space. By Till Nagel and Christopher Pietsch. Urban Complexity Lab, FH Potsdam <a>http://uclab.fh-potsdam.de/</a> This talk introduces the project and some of its goals and visualizations, and shows our design process in analyzing the data and designing the visualizations. cf. city flows was exhibited at the Streams and Traces in November 2015 in Berlin. Find more information at http://streamsandtraces.com/ More information coming soon.