Actually, the data suggests that humans naturally choose safe speeds without posted limits, and usually higher than what posted limits would have been. http://a

Actually, the data suggests that humans naturally choose safe speeds without posted limits, and usually higher than what posted limits would have been. http://archive.etsc.eu/documents/copy_of_Speed%20Fact%20Sheet%201.pdf http://archive.etsc.eu/documents/copy_of_Speed%20Fact%20Shee... Everyone I've met who drives under the speed limit is a bad driver who doesn't understand traffic dynamics enough to understand when going faster is more expedient and matches traffic patterns. By going too slow, you actually cause a hazard by forcing people to pass you.