Perhaps there should be a visual indication on self-driving cars. Not something ridiculous on the roof, maybe something glowing in the license plate area, or up

Perhaps there should be a visual indication on self-driving cars. Not something ridiculous on the roof, maybe something glowing in the license plate area, or upper window area. I imagine most people are more considerate around learner drivers because of the signs, without which you could (quite rationally) get frustrated.