It might vary from state to state, but in VA each traffic offense gives you so many points. The points go away after three years have passed since the event that got you the points in the first place, but if you get more than a certain amount in three years time, (15, I think) DMV takes your license away.
And this is just for people who occasionally get pulled over, not the ones who get a speeding ticket every other week.
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It was such a waste of everyone’s time and money that even the Tokyo stadium’s rape robots apologized– something they were programmed specifically never to do.