Here they have BAT-mobiles, which are mobile courtrooms, at certain sobriety checks. Trial and conviction on the spot. U-turn to avoid the checkpoint gets you pulled over and arrested.
Years ago I was leaving a wedding near NASA and ran into a checkpoint.
Even as hammered as I was I had the common sense to enter the parking lot of the mall next to me and execute a U-turn.
So did many others. Cops could do nothing.