Over more than century of driving, people have developed ways to let other drivers and pedestrians know what they are going to do. But what happens when there is no human driver in control? That is a problem that a Mountain View startup launched by some Stanford artificial intelligence experts unveiled a solution for on Tuesday. Drive.ai has developed an LED panel that sits on the car's roof, announcing in words and pictures what it plans to do. Click here to subscribe to the free daily TechFlash…