Wendell Cox has published his tabulations of 2007 mode choice commuting data from the Census Bureau's American Community Survey data. The data are for the nation and the metropolitan areas. Subtract data for the outlier New York metro area from the U.S. data, and note that percent working at home exceeds percent using public transit, 4.1% vs. 3.2%. This includes the many transit "successes" that we read about as gas prices began their ascent in 2007.
Today's LA Times reports "Sales tax measure to go on ballot" which refers to a sales tax increase to pay for an addtional $40 billion of public transit for California.
Throwing money at public transit (since about the mid-1960s) "to get people out of their cars" and onto transit has not done the trick, but that is irrelevant to politicians and greens of all stripes and parties.
Wendell's 2000-2007 comparisons also show a decline in carpooling. This is, of course, why we should build still more HOV lanes.