A team of experts showed that a simple sticker attached on a sign board can confuse any self-driving car. The autonomous cars image-detecting algorithms were not able to distinguish the road signs and interpreted them as Speed Limit 45 sign in 100 percent of test cases. A similar camouflage was tested on a RIGHT TURN sign and the cars wrongly classified it as a STOP sign in 66 percent of the cases. The researchers also tried a Camouflage Abstract Art Attack by applying smaller stickers onto a STOP road sign.”]
Source: http://securityaffairs.co/wordpress/61870/hacking/self-driving-car-hack.html