No, that's not what these are. The red light ones are uncommon here, but times I've seen them they're big old set ups with flashing lights. These look like security cams on a 6 foot pole attaches to the metal arm. And there's often smaller secondary device that is less camera like. I'll get a picture sometime
it's probably radar for speed detection.
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or at least "wrong direction movement" for red light runners
Will return with pics today or tomorrow