It shouldn’t go over the speed limit, and under no circumstances should it take the liberty drivers usually take of being within 10% above the limit.
I hope no one wrote it that way.
Speed limits are usually too low. Often they have nothing to do with engineering or safety considerations, but are primarily revenue-oriented. If the advent of autonomous vehicles forces regulators to listen to the engineers for a change, that will be an unalloyed Good Thing.
-- 55% of drivers regularly exceed the speed limit, meaning that the speed limit represents the 45th percentile speed
-- driving between the 50th and 90th percentile speeds is the safest
Taken together, driving at the speed limit is significantly unsafe.
Why not lower it to 5 MPH on a nationwide basis? Think of all the lives that would save!
You have to remember that many people on here probably don't own a car, or necessarily even hold a driver's license. They most likely either live at home or at school, or take a bus to work (NTTAWWT).