The data across countries suggest Americans are world leaders in owning vehicles and not so high on the list of homeownership. Few countries have more vehicles than us but over forty have higher percentages of homeownership. Yet, put these two features of life together – driving and owning a home – and they create something fairly unique in the United States.
To start, it is not just that Americans have a lot of vehicles: daily life and spaces are structured around these vehicles. For most Americans, getting to the places that are required for daily life – work, food, school, recreation – requires a vehicle. This is seen as normal and we have adapted in unique ways to this including developing fast food and big box stores (both could not exist in the same way unless people have their own vehicles, and often large ones at that, to operate). It does not have to be this way and indeed many other industrialized countries are not as dependent on vehicles for these daily activities.
As for homes, the availability of cars plus a desire to have a private single-family homes means that Americans are pretty spread out. This way of life reaches its apex in the American suburbs, which range from denser communities where driving involves shorter distances to places on the metropolitan edges where significant driving is needed for every major activity. This suburban form already existed to some degree before cars with the help of trains and streetcars. But, the availability of cars to the public in the 1920s really helped boost suburbanization as did subsequent decisions by different bodies of governments and others to promote an automobile-based society.
Critics of this way of life are plentiful even as we are nearing one hundred years of this arrangement. For more than a third of the existence of the United States, the goal of many is to own a vehicle and a home. To change this would require significant adjustments in a variety of areas. Imagine an America with smaller car companies (think of everything from the economic ripples to what commercials would replace auto ads on TV) or fewer fast food restaurants or no new sprawling suburban developments. We can see the resiliency of car and home narrative still: even as fewer than two-thirds of Americans own their dwelling (with more recent drops after the fallout of the housing bubble plus rising housing costs in certain places), it is still the goal of majority of residents (including younger Americans) and is said to be worth aspiring to. When the economy picks up, it seems Americans return to purchasing cars and homes.
Either cars or homeownership separately may not be enough to mark a unique American lifestyle. Put them together and they shape an entire society of over 300 million people.