That's for when you run the red light, it snaps a picture of you. And then they send you a ticket in the mail.
Discussion
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
Either way, you look at it, they're all cameras. Hahaha 🤷🏽♀️ there is no escaping the matrix unless you luve in the Forrest haha 😆
I'm certain they're surveilling or logging cars. Need to find out for sure