You&#x27;re assuming car ownership will remain in place as it is now. If vehicles are shared instead of fully owned, you can be more efficient. Think of how many trips are simply transporting a car. For example, let&#x27;s say I need to pick up a friend from the airport. I would waste a one-way trip going to the airport. I didn&#x27;t need to go to the airport. The only reason it was necessary for me to go is that I needed to get a car to my friend.<p>If my fried could have just summoned the nearest self driving car, an entire one way trip wouldn&#x27;t ever occurred.