Living in Germany, I never heard about anyone ticketed for this. The only case really covered by this rule is, that one drives extremely slow under good conditions. Otherwise, in many situations &quot;safety&quot; would be a good reason. And in general, you cannot be asked to drive faster than your car can go. With the exception of the Autobahn and a very few similar streets, the Google car would be legal to drive speed-wise, most tractors are even slower and road-legal.