The Census Bureau collects data on how Chicagoans get to work via the American Community Survey. The charts below show commuting patterns for Chicago, from the S0801 table: Commuting characteristics by sex 1-year estimates.
Thanks to Steve Vance at Grid Chicago for reporting on the release of the 2011 numbers.
Breakdown of Chicago's workforce commutes in 2011 by mode. Driving (alone, carpool or taxi) make up 60% of all commutes, with public transit making up 27.6%.
Breakdown of Chicago's workforce commutes by mode. Driving is still the dominant mode, though public transportation (CTA and Metra) have increased since 2005. Biking commutes have doubled from 0.7% in 2005 to 1.4% in 2011.
Tip: Click on the commute modes in the legend below to hide or show that column