Yikes: More than 100 million American workers drive to work alone. Rampell, one of my fave economics bloggers, explains:
About three-quarters of American workers drove to their jobs alone in 2008. The least carpool-friendly states appeared to be Alabama, Tennessee and Ohio, where about 83 percent of workers drove alone. The District of Columbia and New York — whose residents are heavily dependent on public transportation — had the lowest rates of solo commuters, at 37.2 percent and 53.7 percent.
Anybody have the stats for Toronto?