I'm surprised to see Boston and Washington D.C. tied for first. I didn't realize those cities have so many "active" commuters. Chicago is #8 with 8.1% so we have some room to grow.

Since 2005, the percentage of bike commuters in D.C. has more than tripled, to 4%. It now ranks second in a ranking of the big cities where people bike the most, according to a new benchmarking report from the Alliance for Biking and Walking. For "active transportation" in general, including people who walk to work, it ranks first, tied with Boston at 16.7%.

D.C.'s success didn't happen by chance. Ten years ago, when the city had 17 miles of bike lanes, it made a master plan calling for 60 miles of completed lanes by 2015. Last year, the 69th mile was built. Capital Bikeshare, one of the country's most successful bike share programs, started running in 2010. That same year, a bike lane was built down the middle of Pennsylvania Avenue, in view of the White House.

http://www.fastcoexist.com/3057321/the-top-10-us-cities-where-the-m...