This patent tells us a bit:<a href="https:&#x2F;&#x2F;www.google.com&#x2F;patents&#x2F;US9176500" rel="nofollow">https:&#x2F;&#x2F;www.google.com&#x2F;patents&#x2F;US9176500</a><p>It performs actions for expected information gain. Driving slower to see more.<p>There are so many sides to this story though. I won&#x27;t trust a car from Google if they don&#x27;t publish their research.