Driving Up, But Down Per Capita
This analysis of the data shows that per capita vehicle miles traveled is actually down in the U.S.
"We've added over 29 million people since 2000, and 7 million people since 2007 alone. So one would expect driving to increase, too. What is interesting to note is that combining the growth in VMT and population shows a per capita driving rate that is not growing and, in fact, is pretty much at the same level as it was in 2000."