"Ausfahrt" is German for Exit. When we first moved we thought Ausfarht was a town.and apparently all exits led there. It seems many Americans have had the same thought. I have a souviner mug with the caption, "Where in the heck is Ausfahrt, Germany?
The Autobahn is a highway without a federal mandated speed. Everyone drives however fast they want! A fun fact is it is illegal to run out of gas on the highway! You could be fined or have your license suspended for up to 6 months!