Sommer Mathis

Courtesy Washington Area Bicyclist Association

Don't Tweet: In D.C., a New War on Public Safety Information

Citing safety concerns, the city opts to filter which public safety incidents citizens get to hear about

More Ways Neighborhoods Can Decrease Car Use

Your responses from this week's The Big Fix

Car-Crushing Vilnius Mayor Wins 'Ig Nobel' Peace Prize

Arturas Zuokas's viral tank video honored for 'improbable research'

Lisa Margonelli

Brooklyn's Super Convenient but Mostly Illegal Private Bus Service

Dollar Vans offer a much-needed transit link. What's so wrong about that?

Fairmount Park in Riverside, Calif. (Courtesy APA)

Great Neighborhoods, Streets, and Public Spaces for 2011

30 examples of great places in American cities from the American Planning Association

Benoit Tessier / Reuters

Paris Launches One-Way Car-Sharing

Autolib offers compact, all-electric vehicles modeled after Velib

When We Were Still Getting Used to Traffic Lights

An archival film from 1937 explains how automatic traffic signals worked in different cities across the country

2011 Major League Baseball Regular Season: Attendance by Team

Philadelphia tops the regular season attendance list for the first time in franchise history

Walk Score Offers Apartment Searches Based on Commuting Time

Data from 209 transit agencies combines with Craigslist rental listings

Reuters/Kim Kyung Hoon

The Future of GPS Data in Smarter Planning

Researchers in Beijing are working with taxi drivers to identify the sources, not just the locations, of congestion

Still from 'Sub City Paris,' by Sarah Klein and Tom Mason

Sub City: If Only All Commutes Were This Serene

A pair of New York-based filmmakers marvel in, and just above, the underground

By Flickr user granth, used under a Creative Commons license

Welcome to The Atlantic Cities

What you should—and shouldn't—expect from The Atlantic's newest website

State of Play: Playground Infrastructure in 20 Major U.S. Cities

Which major U.S. cities provide the best, and worst, mix of playgrounds for their youngest residents?

Detroit: City on the Move

A 1965 promotional film for Detroit reminds us how far the city fell behind