For unmanned vehicles, a fourth traffic light was invented.

Scientists proposed to approve the fourth traffic light signal for unmanned vehicles - white. Traffic modeling has shown that this color will be optimal. It will signal the AI driver to act like the cars ahead. The concept of the fourth signal was first announced in 2020. The scientists explain that the existing colors will retain their meanings, while white will mean "follow the traffic in front": you need to go if he is driving, or stand if he is standing. This proposal was based on the idea that drones can communicate with each other and distribute the traffic order more efficiently than traffic lights.