Cars driving along a highway in Berlin, Germany. The German Social Democrats (SPD) are proposing a nationwide limit of 120 km/h on all highways. Germany, in contrast to the rest of Europe, still has no speed limit on many portions of its large highways. Photograph: Sean Gallup/Getty Images

There are many rites of passage in Germany, such as encountering public nudity in parks or open-ended drinking in pubs. But none is quite as ha(...)