A report from the University of Michigan Transportation Research Institute supports these findings. The report concludes that the adoption of autonomous vehicles would reduce the number of cars owned by the average U.S. household from just over two to one vehicle per household. According to the report, one-vehicle households will be made possible because self-driving vehicles will use a “return-to-home” mode after they drop one household member at work so other household members can use the family self-driving car to be shuttled to errands and activities.