@enobacon It's not really necessary to limit them to that low of a speed. 20-25 mph would deter most people from building their lives around motor vehicles. More people would necessarily live in population centers, because they would not be able to commute or travel long distances in short periods of time, and that alone would eliminate most people's ownership of motor vehicles, just like most people in the late 19th Century did not own horses and wagons or carriages in cities.