Karlsruhe is a city in Germany.
Getting on the Autobahn
If you're heading to a city in Germany which is a littel further away it's best to get on the Autobahn. Take the tram 1 or 2 towards "Durlach" or "Wolfahrtsweier" and after passing through a tunnel get out at "Weinweg". If you walk a few meters back, you can stand at a Esso station or just before it and ask the people where they are going. Everybody who passes by will head to the Autobahn in some direction.