This happened on the 4th of July. The state's way of mocking us to our free little faces, I guess.
A bit of history: The Supreme Court ruled DUI roadblocks to be an allowable intrusion of our constitutional rights in Michigan State Police v Sitz . Note my phrasing - the court decided not that it wasn't a violation of our rights, because it was. But since it was a reasonable intrusion, they were going to allow it in the name of safety.
Oddly enough, as a result of this case, DUI checkpoints are now unconstitutional per Michigan's constitution, which was amended to prohibit them while Sitz was winding its way up the appeals process on the way to the Supreme Court.
Statistically, Michigan's drunken driving crashes and fatalities have fallen in sync with those in the rest of the country, seeming to illustrate that the checkpoints aren't a driving force behind the dramatic national improvement in the numbers.
Although Michigan proves there's no legitimate reason for DUI checkpoints, it is incredibly unlikely that SCOTUS will ever revisit the issue. And while it is technically possible to ban them on a state level, these days any such effort would likely be hysterically demagogued by both the left and the right.
In short, because there is no power to be gained in the freedom position, it would be political suicide.
Remember, Sitz was decided way back in 1990, meaning there is an entire generation that does not know that once upon a time, we were allowed to drive from point A to point B without being stopped for absolutely no reason. For those people, the authoritian intrusions seem natural and even necessary.
We know better, but these days, I doubt we'll ever find our way back.