I'm tired of morons thinking they understand traffic engineering. The speed limit should be set at around the 80th percentile of car speed on the road. If the 80th percentile is 20mph faster than the speed limit, the speed limit is broken; hell if its 10mph slower than average its being set at about the 30th percentile likely; so 70 percent of people are speeding on that road. Time and again studies show that most people drive a safe speed for the road and conditions regardless of the speed limit, whether faster or slower.
You on the other hand think that the speed limit is set by some omniscient being that knows whats best for the road and sets it and then the majority of people, being sheep, break it and lead to evil consequences. Because hey OBEY the limit, its not a retarded limit that needs fixed, because YOUR BETTERS SET IT.
I'm sure you'd prefer your cars designed by some randomdood since you prefer your roads and speed limits not designed by a qualified engineer either.