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Do these cars have billboards or indicators of some kind? If not, they really should. In my town I wait for cars to stop before crossing, and make eye contact or get a friendly wave to let me know they see me.

If a driverless car just stops, I don't feel comfortable walking in front of it if there's no indication that it sees me.

How could that be solved?

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they should have some sort of hazard like flash when they are stopped for an obstruction like humans in the roadway. that would also reduce the rear end situation where they are unreasonably stopped in traffic due to crappy software.

Drive.AI, before they went defunkt, had LED billboards not unlike what you described. It was a gimmick that didn't take off in the rest of the industry due to the universal presence of a safety driver.

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