I'm not sure how the cameras used to take pictures of car license plates so that the driver can be identified and required to pay a toll for use of the road, is

I'm not sure how the cameras used to take pictures of car license plates so that the driver can be identified and required to pay a toll for use of the road, is meaningfully different than a camera used to take pictures of car license plates (and other things in the scene) for the purpose of detecting crime. It's still the government running a camera in public to take pictures of things, including cars with clearly-visible license plates, and then knowing that the car was at a specific location at a specific time.