EDIT: Whoops, missed the border patrol part, and your windshield crack (should get that fixed) obscured the rest of the sign. Dunno, probably just want video if someone forces their way through, or they discover a problem later. Outting multiple cameras at different anles gives you a better view, as well as preventing a larger vehicle from obscuring the view at precisely the right moment.
Bah, it's Texas. ALL the windshields are cracked
Interesting thing about the mounting of the "cameras". I went through the Southbound version this afternoon, followed by an 18-wheeler. I happened to notice that the topmost enclosure is
below the cab window height, just about even with the bottom of the windshield.
Personally, I doubt this has anything to do with State highway use. The pictured installation is within a 1000ft of the checkpoint while the opposite lanes are right next to the checkpoint itself. If it were State equipment then it would be about 15-20 miles further on where the State weigh station is, IMO. I think this is for one of those face-recognition systems, but why have the modules that face the rear of the vehicle then?