"Over the next four years, we are likely to witness the greatest mass exodus of vehicles off America’s highways in history. By 2012, there should be some 10 million fewer vehicles on American roadways than there are today—a decline that dwarfs all previous adjustments including those during the two OPEC oil shocks. Many of those in the exit lane will be low income Americans from households earning less than $25,000 per year. Incredibly, over 10 million of those American households own more than one car."