As the population expands, simultaneously so does the generating and accumulation of automobiles. Imagine if you will, the congestion of traffic while traveling from one area of a city to another in the approaching future. Mass transit, two wheeled vehicles or any other forms of commuting with alternative transportation would be a more practical solution to the congestive problems that will arise.
Bearing in mind, that the beneficial assets of reducing urban pollution, chaos, noise and global warming would diminish the chances of living in a society like a mountain of ants.
Otherwise, we would routinely be interrupted and virtually living on top of each other.