Some traffic enforcement cops have cameras on every side of there vehicles, especially here in America. Which makes more work for them because the vehicle is automatically checking for infractions from the passing cars.
The technology we live in today is insane, I don't see unrealistic RP here.
To Piggy back on this subject more.
This isn't an overpowering tool at all. This isn't powergaming. Don't you think a camera can pick up text alot easier than a face. Yet we have phones that can remember and read faces. You use filters on instagram, snapchat. Again you'd think reading a simple license plate would be easier than picking up somebody face.