they did that back in the 70's, what really happened is that everybody was tailgating everybody else which caused accidents and carnage, what else happened is that driver's stayed on the road longer which caused accidents and carnage, what else happended is that the states dumped millions into raping speeders in order to fill their own coffers (speed tax if you will) which meant everybody slammed on their brakes at even the sight of a cop in an adjacent donut shop which caused accidents and carnage. The speed limt does absolutely nothing for in town traffic congestion where cars get "0" mileage sitting in traffic. If any politician even breathes this kind of BS they need to be taken out , tarred and featherred like the old days.
