For statement 1. It is a positive to an extent. Stop sighs can often be covered in graffiti, which can began to cost more and more every time you repaint them. For statement 2 and 3. Traffic signals would cause less accidents because of the fact that they “force” you to stop, they give every car a chance to go, and give pedestrians the right of way to walk as well.
From most cases I have studied it has mostly been changing the painting or applying fake linsince plates. But the most reasonable on here would be Alerting or switching the vehicle identification number
