Increased living costs and environmental factors have resulted in smaller, cheaper, more energy-efficient cars. More people than ever before are choosing to live and work alone, while the number of children per couple has also declined, two additional factors which have led to these lighter, more compact vehicles, a large percentage of which carry just one or two passengers.
The vast majority of cars in the developed world are now computer-controlled,* while traffic flow and other road management issues are handled by advanced networks of AI. The resulting fall in congestion has boosted some economies by tens of billions of dollars