And yet it appears that many countries (including most of Western Europe) have a higher per capita ownership of autos.
"The U.S. is ranked 25th in world by number of passenger cars per person, just above Ireland and just below Bahrain. There are 439 cars here for every thousand Americans, meaning a little more than two people for every car. That
number is higher in nearly all of Western Europe -- the U.K., Germany, France, Spain, Italy, Belgium, etc. -- as well as in Japan, Australia, and New Zealand. It's higher in crisis-wracked Iceland and Greece. Italians and New Zealanders have nearly 50 percent more cars per capita than does the U.S. The highest rate in the world is casino-riddled Mediterranean city-state Monaco, with 771 cars per thousand citizens."
http://www.theatlantic.com/internat...e-more-cars-per-person-than-americans/261108/
I suspect that it's a question of priorities. "Should we invade Iraq or should we invest in infrastructure like highways".