In 1960, 12.1 percent of American workers went to work by transit, which was then largely privately owned. Despite (or because of) public takeover of almost every transit system in the country, transit’s share steadily declined to 4.7 percent in 2000. Then, in 2010, it crept up to 4.9 percent. The 2014 American Community Survey found that it has increased still further to 5.2 percent.
Since 2000, the increase in transit’s share has come at the expense of carpooling, which fell from 12.6 percent to 9.2 percent in 2014. Biking and walking also fell slightly from 3.4 to 3.3 percent. Driving alone, however, grew from 73.2 to 76.5 percent. So the increase in transit’s share did not translate to a reduction in the number of cars on the road. Indeed, using census carpool data and assuming that “5- or 6-person carpools” have an average of 5.5 people and “7-or-more-person carpools” have 7 people, there were 104.2 million cars commuting to work in 2000, 110.8 million in 2010, and 117.6 million in 2014.
One intriguing table (B08141) shows commuting data by the number of cars in the household. Nationally, about 4.5 percent of workers live in households with no cars. Of these, about 41.5 percent took transit to work, 20.4 percent drove alone, and 11.3 percent carpooled.