There could still be a massive in the total number of individual cars, though. If you switched from the US average of 2 cars per household to one car for each c

There could still be a massive in the total number of individual cars, though. If you switched from the US average of 2 cars per household to one car for each child under the age of eleven, that would be a drop from 250 million individually owned cars to 50 million individually owned cars.