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> the US already has "facial recognition vans" on the road in the form of Waymos that will provide video to police upon request.

These seem meaningfully different than UK's facial recognition vans. The government has to request the footage from Waymo for a specific place/time. I don't think they can put in requests like "analyze all Waymo video data for this particular face and tell me where they were and when". It's much narrower in scope.

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If the US government requests such access, do you see a world in which Waymo says no, given the current landscape?

Furthermore, if a National Security Letter came along with that request, Waymo wouldn't be able to let anyone know about it.

It is definitely different. I do think they could put in a request like "give me all footage between these hours in this area", and then do the facial recognition themselves.

It's conceptually pretty similar to cell tower dumps, where they ask for all data from a cell tower during a particular time frame. This was recently ruled unconstitutional (https://www.courtwatch.news/p/judge-rules-blanket-search-of-...), but they used it for like 15 years before that (https://arstechnica.com/tech-policy/2013/08/how-cell-tower-d...). I can imagine blanket car footage dumps working for a similar amount of time.

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