The patent, which was filed in September 2012, was granted in November this year. It describes ways to show messages to pedestrians, such as a red flash light, a display sign reading STOP on the left side of the car when it detects someone trying to cross the road or even the possibility of a robotic arm which will wave gestures. It also outlines a speaker system which may play messages such as “coming through” or “safe to cross” while unsure of its surroundings.