In the city Seoul, Korea where I am from, they have routine alcohol checkpoints at various different points in the city. Basically, the cops stop everyone before permitting to pass through the alcohol checkpoints.
In San Francisco here where I live now, we don’t have checkpoints but patrol cars will pull you over on individual-basis. We have it very lucky indeed that at least we are not forced to blow into police breathalyzers at random times when we could have had one drink too much over the limit.
I think DUI laws are sound yet they can be rather harsh to t