Starting this fall, all second graders in D.C. public schools will learn to ride in PE class.
Focusing on the peak period, as the Texas A&M Transportation Institute does, can miss the big picture.
That’s double a U.S. Geological Survey estimate made in 2006.
A year into the Silver Line era there have been some failings, but that doesn’t make the great planning experiment a failure.
Microplastics contaminate the water on a massive scale.
From Scalia's Tears to Ruth Bader Gin & Juice to the Pride Cocktail Tree.
Arlington County is developing a simple suite of tools it hopes can change the way people get to work.
A local nonprofit is giving Washington’s homeless the tools to film their experiences.
Photographer Colin Winterbottom also captured the hard work of the crews responsible for building and maintaining the city's monuments.
The "Geotaggers' World Atlas" follows the path of Flickr images.
The share of Capital Bikeshare members making more than $100,000 is growing.
Summer festivals, fall foliage, and snow also make an appearance in this Library of Congress collection.
It was created using a collection of 1937 railway timetables.
In 8 revealing facts and figures, plus 3 charts.
This animated data viz reveals that aliens don't shy away from cities.
Architects, however, are becoming more attuned to the issue.
More and more cities are realizing the benefits of off-hour deliveries.
For instance, there's a reason why the city has so many tree-lined streets.
Smoking is outlawed in all public spaces, including inside private clubs, bars, hotels, and restaurants.