For some years it has been an article of faith among many, and increasingly the general public, that the world is awash with vehicles and it is impossible for the planet to support any further increase in motorisation. But this is a false prospectus. Without wishing to diminish the concerns of those who are deeply concerned about the future of the planet, some simple facts always confound the view of people whose lives are constrained by traffic jams and see the world through local conditions.