With actice support of two NAO-robots from Wolfram Burgard's AIS-workgroup, the new tram line 4 was opened on Friday, December 11. The new line in pink is going from Zähringen over the Hauptbahnhof to the provisional end station "Technische Fakultät" in a wide arc. The last segment shall be completed in 2018. You can find the VAG timetables here...