For the first time since World War II, young Americans (in this case, millennials) drive less than previous generations. Just why this is happening is a matter of dispute, though probably the recession and changing living habits have a lot to do with it. (As a card-carrying millennial myself, I strongly dislike driving and don't own a car.)
This has led many to speculate that the whole structure of American transportation may be due for a change. Perhaps trains, buses, and bikes are the wave of the future! That may be so, but the country would have a very long way to go. Only New York City and Washington, D.C, have anything approaching a reasonably comprehensive intra-city public transport system, and only Los Angeles is doing anything close to the upgrades needed to create one. As a result, more than three-quarters of Americans still commute by driving alone, according to the Department of Transportation. Transit comes in at a measly 5 percent:
Back in 2000, the proportions were nearly identical. That's what six decades of cars-first transportation policy gets you.