Should speed limits be abolished? No. Should certain low-traffic roads which are straight (more or less), flat (again, more or less) and have large amounts of available run-off area have no daytime speed limit? I think that might not be a bad idea. To eliminate speed limits safely, one would have to build a road with that intent from the start. The current interstate system was designed for 80 miles per hour when it was built if I recal correctly. As for your use of Germany as an example, it is a bit flawed, although it does point out what I feel is the biggest limitation in the American driver's licensing system, which is a lack of proper training for new drivers. Again, if I recal correctly from 5 years of studying the German culture and language in school, a German driver's license runs roughly 1500 USD, and their supervised driver training period includes several hours at night, several hours in the city during the day, and several hours on the Autobahn during the day. For America to go without a speed limit on highways without instituting some sort of retroactive driver training program would be to invite disaster. A different solution that I have heard proposed and am not sure if I support or not, is to allow persons holding "special" licenses signifying greater training and the passage of additional tests to drive at a speed higher than that of a normal driver. I like this idea in that it only allows those persons who are capable to drive faster, but I also recognise that differences in speed between cars on the road is the main cause of accidents, so it is a two-edged sword.
Zenmervolt