I drove a lot of small country roads as well. Two lane roads that are about as wide as one and a half US lanes. No speed limits. Occasional blind hills and turns. Farm equipment occasionally on the road.
Country roads actually have an implicit speed limit of 100km/h unless stated otherwise. http://de.wikipedia.org/w/index.php?title=Datei:Zeichen_393.svg&filetimestamp=20060729152001