What you’re looking at is a salt circle, a traditional form of protection—from within or without—in magical practice. In this case it’s being used to arrest an autonomous vehicle—a self-driving car, which relies on machine vision and processing to guide it. By quickly deploying the expected form of road markings—in this case, a No Entry glyph—we can confuse the car’s vision system into believing it’s surrounded by no entry points, and entrap it.
I am glad they put up a baseball cap and a Pepe t-shirt. After all, it was on private property. I also read they found this pole by stars, planes, sunshine base for time zone and some guy beeping his horn (listening on the livestream). The pole, I believe it was in Tennessee. Amazingly, they found this. I guess “The Trolls” got too much time on their hands. Probably got a decent healthcare (Obamacare) & great pay (Welfare). They were only following their “ART” as that dingbat Nancy Pelosi said during the Obama era. Making America Stagnant, STILL. Have to handle it to “The Trolls”. Pretty damn funny.