IIRC There's a principle in Judaism about deliberately not doing things which you know aren't forbidden but might reasonably be interpreted (wrongly) as forbidd

IIRC There's a principle in Judaism about deliberately not doing things which you know aren't forbidden but might reasonably be interpreted (wrongly) as forbidden by any observers. So that not only are you behaving correctly but also onlookers see you behaving correctly. For example if you're not supposed to eat bacon, the fact this product looks like bacon means you shouldn't eat that, even though it's not bacon - because if you do and somebody else sees that, what they saw was you eating bacon. In this case it may well be safe for the Waymo to pass a bus but, the rule says not to pass a bus because humans will assume if the Waymo can pass a bus so can they and that's false.