Most errands involving cars primarily involve transporting people, who are usually more than capable of getting into cars by themselves. In fact, that's the who

Most errands involving cars primarily involve transporting people, who are usually more than capable of getting into cars by themselves. In fact, that's the whole point of Uber's business model. If I can send my car out without having to drive it myself, I'll use it for things things like picking up kids. Take my spouse to work, drive back home, take me to work at a different time, repeat. Right now many families buy two cars, often not because they need to drive both of them at exactly the same time, but because they need to use them in different places. If you can send the car between locations then you can use one car, and the cost is that the car spends time on the road, making someone else's commute worse. Again, this is Uber's entire business model, and if they're successful at getting everyone to use ride-sharing, regardless of self-driving cars, then we will trade a bunch of parking spaces for more cars on the road. It's literally how Uber works. In addition, if your car can drive itself places, whole new business models will spring up around things like delivery of food, packages, etc. Businesses will be happy to start providing you the service of putting stuff in your trunk. Yes, I'm guessing that the arrival of self driving cars coincides with electric drive becoming commonplace. They could even go hand in hand: send the car back home to charge, then have it pick us up later. All of these things reduce the incremental cost of having your car on the road, which will drastically increase traffic.