Polka Dots on the Highway

If you have driven between Rockford and Buffalo you are no doubt familiar with the dots on the highway. We saw them for the first time when we visited in MN the end of June and it was, 'What the --." 
And if they were going to put polka dots on the highway why not make them pink?
Actually, they do serve more of a purpose than a conversation starter.
This area has had a lot of crashes due to tailgating.
As you can see by the sign drivers are to keep two dots between them and the car in front. At fifty-five mph this adheres to the three second following distance rule. 
It might work in MN, but I'm afraid it would add to the fatalities in NC. I'm very much afraid that driving fifty-five and leaving that much space between cars would send our drivers into cardiac arrest.