It's a late night in the metro area of Phoenix, Arizona.Under the artificial glare of street lamps,a car can be seen slowly approaching. Active sensors on the vehicle radiate a low hum. A green and blue 'W' glows from the windscreen, giving off just enough light to see inside-to a completely empty drive seat.
The wheel nagvigates the curb, parking as an arrival notification pings on the phone of the person waiting for it. When they open the door to climb inside, a voice greets them over the vehicle's sound system. "Good evening, this car is all yours -with on one upfront," it says.