Bundesautobahn 15 (translates from German as Federal Motorway 15, short form Autobahn 15, abbreviated as BAB 15 or A 15) is an autobahn in eastern Germany. It is one of the original Reichsautobahns and connected Breslau to Berlin. Construction was not finished during World War II, and the autobahn was single-lane only until the German reunification, after which it was upgraded.