Google: The latest chapter for the self-driving car: mastering city street driving "We’ve improved our software so it can detect hundreds of distinct objects simultaneously—pedestrians, buses, a stop sign held up by a crossing guard, or a cyclist making gestures that indicate a possible turn"

http://googleblog.blogspot.com/2014/04/the-latest-chapter-for-self-driving-car.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+blogspot/MKuf+(Official+Google+Blog)