Was in a car today and there was a Waymo in front which had an LED indicator in the LIDAR array on the roof with a depiction of a walking human and it took me a while to figure out that it meant "I have detected a human walking in front of me" which is presumably an alternative to making eye contact with a driver?
@mjg59 Hopefully this will gets standardised, like the Mercedes turqoise lights that indicate autonomous driving: https://edition.cnn.com/2023/12/19/business/mercedes-adds-new-light-color-blue-for-self-driving/index.html