A growing number of cities are letting buses cruise highway shoulders to improve service
Why the world's most popular tweeters are clustered in a handful of American cities—and Brazil
Obama has a new plan to help owners refinance their mortgages, but some places will benefit more than others
Factors like bad weather and long commutes don't make a place less walkable
The art collector discusses why she's so passionate about Miami, and which city is the best place to live for artists
Innovative ways to reuse the empty space beneath overpasses
A survey of 55 major U.S. cities shows big gains in many places, but plenty of regional variation
Which major U.S. cities provide the best, and worst, mix of playgrounds for their youngest residents?