Waymo can now tell nearby cars to back up

My Waymo just told some parked cars to back up as it began a three-point turn. This is my first time witnessing this feature.

I wonder if Waymo will be able to follow that kind of request itself. If someone gestures or verbally requests for a Waymo to back up and make room (loud enough to be heard), it should back up.

This was also in rainy weather, so I wouldn't fault the Waymo for errantly detecting one of the parked cars as on.