Denver

Flick user: alexindigo, under a Creative Commons Licence

The Best and Worst of Official City Flags

They're less visible, but most cities have flags just like countries or states. Some are great. Others, not so much.

REUTERS/Suzanne Plunkett

The Methodology of Bike-Share Station Placement in New York City

Taking lessons from its predecessors, America's largest city has crafted a three-pronged approach for bike-share deployment

Flickr user: DaveFayram, Creative Commons

Is Bicycle Commuting Really Catching On? And if So, Where?

A survey of 55 major U.S. cities shows big gains in many places, but plenty of regional variation