Waymos crash less than human drivers

Waymos choose the routes, right?

The issue with self-driving is (1) how it generalises across novel environments without "highly-available route data" and provider-chosen routes; (2) how failures are correlated across machines.

In safe driving failures are uncorrelated and safety procedures generalise. We do not yet know if, say, using self-driving very widely will lead to conditions in which "in a few incidents" more people are killed in those incidents than were ever hypothetically saved.

Here, without any confidence intervals, we're told we've saved ~70 airbag incidents in 20 mil miles. A bad update to the fleet will easily eclipse that impact.

I wonder if you can decrease the impact of (2) with a policy of phased rollout for updates. I.E. you never update the whole fleet simultaneously; you update a small percentage first and confirm no significant anomalies are observed before distributing the update more widely.