Question for SF folks: I see self driving cars all the time in the inner Richmond. This is happy-path driving, all 4-way stops, not much traffic, not many pedes

Question for SF folks: I see self driving cars all the time in the inner Richmond. This is happy-path driving, all 4-way stops, not much traffic, not many pedestrians. Easy driving. Are the firms doing as much mileage in rush hour in tougher driving spots, e.g from Bush to 2nd to the Bay Bridge at 5pm?