image credit: fnp.de
That would be (one stretch of) the Autobahn. For all the tribulations I've had with driving, I do love it; it scares me irl, but not in my wildest, nearly cartoony Autobahn fantasies. Zzzzooooooom.
In conclusion, I (clearly) knoweth not the Frankfurt. So I'll study up a bit more, and some time down the road, I'll revisit it. Time for a(nother) beer.