Flying the Autobahn

We cruised to Berlin via the A9, A4 and A5 autobahns. It's like 500 kilometers of jet runway, and no matter how fast you go, there are cars (mostly Audi's and BMW's) rocketing by as if they're about to take off. German engineering of the cars and the roads makes 100mph and faster feel quite comfortable, but then there are those dinky Smart Cars putting along at 50 or 60. Yikes!