Bundesautobahn 620 (translates from German as Federal Motorway 620, short form Autobahn 620, abbreviated as BAB 620 or A 620) is an autobahn in Germany, connecting Saarlouis with Saarbrücken. Together with the BAB8, it serves as part of the connection between Luxembourg and Germany. As the major part of the BAB 620 is alongside the river Saar, one section in Saarbrücken, the so-called "Stadtautobahn" is subject to flooding several times a year. Because of that, locals jokingly call it "Bundesschifffahrtsstrasse" (Federal water lane) and "Nebenfluss der Saar mit 13 Buchstaben" (tributary of the Saar with 13 letters). A tunnel is being discussed to circumvent the flooding problem.