I've heard that at many times 1/3 of cars on the road in SF are looking for parking. Don't really believe it is that high, but, if true, would be a way for uber

I've heard that at many times 1/3 of cars on the road in SF are looking for parking. Don't really believe it is that high, but, if true, would be a way for uber/lyft use to decrease congestion in a meaningful way.