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by 6gvONxR4sf7o 2056 days ago
What you need is a zillion representative miles. If Waymo mostly drives in easy conditions, or autopilot is mostly only on in easy conditions, then even 100 billion miles won’t let you extrapolate on how safe it is in a full regular person end to end commute scenario.

It’s clearer by hours instead of by miles. If a normal car gets into an accident every 1 zillion hours, and I’ve driven my research car for 20 minutes and then had it parked for 100 zillion hours and it only had one accident accident, I don’t get to claim it’s 100x safer. (100x fewer accidents per hour!) It has to be apples to apples.