> Here is a link with a bit of info about them
Thanks for the information. This is still only in certain places (I notice you mention tourist destinations--yes, that's the kind of place I would expect this to be done), not "everywhere", and it certainly doesn't mean that you or I as sober drivers can relax and believe that we are not still at risk from other drivers possibly being drunk. But I agree it does go beyond only enforcing the laws when someone has already made a mistake (unless you count "driving into a visible DUI checkpoint when you know you're drunk" as a mistake).
If you go to a tourist destination over the summer, there is a good chance you'll see it in a few states. Ive personally driven through them in California.
But, they are not "required" in the sense that you can technically make a (legal) U turn to avoid them and go a different direction.
Here is a link with a bit of info about them. https://dui.laws.com/checkpoint