Probably ya'll need to update the driver's license exam. First, in the written exam, include rules against hitting stationary structures, and quiz them on it before issuing the learner's permit. Then also test for it during the road test. If they can't avoid a stationary structure, perhaps fail them?
In the US, this is not a problem unless you are drunk. When you are driving drunk, you are violating the law anyway.
We don't know the state of the multiple drivers to cause these posts, or for the drivers to run into the corresponding posts, but they're a) in the US (Atlanta, Oakland, and Brookfield, CT) and b) it sounds like it's happened more than a few times.
There are 2.75 - 4 billion buildings on this planet. Something will happen a few times or more than few times. Sometimes asteroids hit the planet and most species go extinct.
In the US, this is not a problem unless you are drunk. When you are driving drunk, you are violating the law anyway.