THE GEOGRAPHY OF TRANSPORT SYSTEMS

Source: U.S. Department of Commerce, U.S. Census Bureau, American Community
Survey.
The above graph underlines two important trends in car ownership in the United States which can be extrapolated to other highly motorized societies:
An important factor behind this trend is the growing participation of women in the labor force, which often requires the ownership of a second vehicle for an household. Still, the last decade underlines a stabilization of the trend of vehicle ownership, underlining a mature market.