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Originally Posted by Ike666
That aside, sobriety check points are one of the most successful LE operations going. In the 70s and 80s more than half of all traffic crashes were caused by impaired driving. The overall count (adjusted for population) is dramatically reduced and the proportion resulting from impaired drivers even more so. Check points work.
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Correlation does not equal causality. The presence of check points can not be definitively shown to be the reason for reduced drunk driving accidents/fatalities. There are any number of other, overlapping variables. Better education, less acceptability, tougher penalties, etc. None can be separated from the others to show definitive levels of causality.
Besides that, the first question is constitutionality. It doesn't matter if it "works" if it's unconstitutional.