Bostonians walk to work, Portlanders cycle, but most drive

Reuters reports:

About half of the commuters who use public transport -- or 2.9 million of 6.2 million people -- could be found in 10 of the U.S.'s 50 cities with the most workers age 16 or over.

The top cities for commuting by public transport were Baltimore, Boston, Chicago, Houston, Los Angeles, New York, Philadelphia, San Francisco, Seattle and Washington, D.C.

You'll notice that most of these cities are losing population.