J. Rybicki, B. Pesch, M. Mauve, and B. Scheuermann. Supporting Cooperative Traffic Information Systems through Street-Graph-based Peer-to-Peer Networks. 17th GI/ITG Conference on Communication in Distributed Systems (KiVS 2011), Schloss Dagstuhl-Leibniz-Zentrum fuer Informatik, volume 17, 2011.