1. Cambridge, Mass.
Bike score: 91.5
Population: 105,162
Percentage of bicycle commuters: 5.6%

Sandwiched between Boston and Somerville, Cambridge's cycling culture is cobbled together from equal measures of college students, long-established bike shops, bustling neighborhoods and squares and a strong community of technology and biotech firms clustered around the Massachusetts Institute of Technology.

Each day, cyclists converge on the bike lanes of the Massachusetts Avenue corridor that runs through MIT, touches Genzyme, Sanofi ( SNY), Biogen Idec ( BIIB), Akamai ( AKAM) and other firms in Kendall Square, makes its way past the music venues and restaurants in Central Square, speeds through the storefronts, newsstands and tourists in Harvard Square and passes the mini malls and modest homes of Porter Square. Those riders could be from Harvard -- which promotes cycling throughout the city with cash incentives for bikes -- or MIT, as 21% of Cambridge residents are college students. They could be blue-shirted office workers or white-coated lab techs or they could be Boston commuters who just happened to find a cool place amid the bars, restaurants and Portuguese barbecue of Inman Square. Or they could just be visitors who got their hands on the Hubway bikes that spilled over to Cambridge from Boston's popular bike-share program.

They're all forces to be reckoned with on Cambridge's roads, as added bike lanes and shared lane space has made them as much a part of daily traffic flow as the buses, trucks and cars they share the roads with. The jam-packed bike racks at MIT visible from Massachusetts Avenue bear this out, as do the throngs of riders who flock to Memorial Drive along the Charles River when it closes to vehicle traffic during the weekends.

-- Written by Jason Notte in Portland, Ore.

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Jason Notte is a reporter for TheStreet. His writing has appeared in The New York Times, The Huffington Post, Esquire.com, Time Out New York, the Boston Herald, the Boston Phoenix, the Metro newspaper and the Colorado Springs Independent. He previously served as the political and global affairs editor for Metro U.S., layout editor for Boston Now, assistant news editor for the Herald News of West Paterson, N.J., editor of Go Out! Magazine in Hoboken, N.J., and copy editor and lifestyle editor at the Jersey Journal in Jersey City, N.J.

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