I was driving I-10 to Houston last week. At a picnic area near Sealy, Tx i spotted a white box trailer parked on the grass near the end of the picnic area merge ramp. Same size as a small U-Haul trailer but it loks like it's made of wood and painted white.
What got my attention was the open panel in the front with two cameras inside. The opening was only 6 or 8 inches wide and all the way across the front wall of the trailer and i could see what looked like license plate readers watching I-10 traffic.
I saw a post where someone thought they had no money for cameras, if you really want a scare, research the "Skynet Program" online.