I get that they might not be approved in the high sierras but just make that a deny list not allow list. Or even just deny the specific conditions you're worried about (snow).
> like i get having a pilot somewhere but once that goes well (and we're way past that point), why isn't it just blanket approval everywhere.
Because “everywhere” isn't a uniform domain (Waymo is kind of way out in one tail of the distribution in terms of both the geographical range and range of conditions they have applied for and been approved to operate in, other AV manufacturers are in much tinier zones, and narrow road/weather conditions.) And because for some AV manufacturers (if there is one that can demonstrate they don't need this, they'd probably have an easier lift getting broader approvals) part of readiness to deploy (or test) in an area is detailed, manufacturer specific mapping/surveying of the roads.