Yes, they have a fleet... that also fails in a number of ambiguous situations that average human drivers handle easily. I've observed failures in more than half my trips through Mountain View.
Two use cases happen repeatedly: first, it's indecisive on lane changes when there are vehicle(s) in its targeted lane for a long time. If it cannot merge over safely due to traffic or rudeness, it will Stop in its lane until a clearance occurs -- the concept of proceeding to the next left and making a U-turn seems incomprehensible. Second, in certain right turn situations on a red light, it will hever turn if there is traffic in far lanes even if the nearest lane has a generous opening. I see this all the time on the right turn from eastbound Central turning onto southbound Castro St., for example.
>Second, in certain right turn situations on a red light, it will hever turn if there is traffic in far lanes even if the nearest lane has a generous opening. I see this all the time on the right turn from eastbound Central turning onto southbound Castro St., for example.
To be fair, even I do that sometimes if I just don't trust oncoming traffic not to do something like changing lanes in the intersection or at the last second. To your point, though, it's all dependent upon the intersection, number of lanes, etc., and I'm not familiar with the intersection in question.
