There's a future, not in the short-term, where 99% of folks don't need to or want to own a car. You hail a ride, and a vehicle shows up, perhaps with 3 of people in the vehicle in their own bubble internally designed into the car. You get in, it drops offs others in the vehicle, and then finally drops you off. The vehicle exhausts its entire electric charge, recharges, and then gets back on the road. The number of vehicles on the road is down 50%.

Like I said, a self driving car isn't ever going to be efficient as a bus. The bus can literally do the same thing as a car, but better.