I mean those automatic cameras that take a picture of your license plate when you go through an intersection without stopping.
Police departments say they work, sometimes amazingly well.
Violations drop from thousands to hundreds. So cops and local governments want to put in more of the things. Like complications in the tax code, like most things governments do, the idea makes sense in the short run. Lots of people, including me, are tired of nearly being hit by people who blast through lights. Cameras are cheaper than cops.