They've made multiple passes by now, you would assume there aren't always going to be cars or people in the way. There could easily be some data scrubbing smar

They've made multiple passes by now, you would assume there aren't always going to be cars or people in the way. There could easily be some data scrubbing smarts in there, too, like knowing that a 3 story building doesn't suddenly jut out to the road in its lowest six feet (notice, for instance, in Brooklyn, the stoops aren't considered part of the building surface).