A team of experts showed that a simple sticker attached on a sign board can confuse any self-driving car and potentially lead an accident. The hack was devised by a group of researchers from the University of Washington that explained that an attacker can print stickers and attach them on a few road signs to deceive most autonomous cars into misinterpreting road signs when they are altered by placing stickers or posters. The attack reports a 100% success rate for misclassification with 66.67% of the images classified as a Stop sign in 66 percent of the cases.”]
Source: https://securityaffairs.co/wordpress/61870/hacking/self-driving-car-hack.html