Advanced Driver Assistance Systems (ADAS) for tramcars for avoidance of collision with obstacles situated directly on the track : ADAS function level 1 / VDV, die Verkehrsunternehmen ; overall revision committee on urban rail rolling stock ; list of authors Joachim Eßwein, VBK, Karlsruhe, Karsten Grzelak, BVG, Berlin, Christoph Hessel, VDV, Berlin, Steffen Kähler, üstra, Hanover, Michael Rüffer, VGF, Frankfurt/Main, Andrea Schröder, üstra, Hanover, Jürgen Späth, SWU, Ulm, Udo Stahlberg, VDV, Cologne, Frank Werchan, DVB, Dresden, Lothar Wolf, VGF, Frankfurt/Main, Andreas Fleischhauer, TAB Hesse, Michael Rosenberger, TAB Baden-Württemberg, Dr. Ruprecht Anz, Bosch, Abstatt, Frank Büttner, Knorr-Bremse, Munich, Matthias Hofmann, Siemens, Erlangen, Marc Lang, Bombardier, Mannheim, Martin Schrey, Bombardier, Hennigsdorf