Biofuels may not actually be all that eco-friendly. Photo by Matt Kroneberger.

An electric vehicle charging station at BYD Headquarters in Shenzhen. Photo by Remko Tanis.

A typical scene of congestion in Beijing. Photo by Josh Vaughn.

The population size of two cities is a better indicator of movement between them than distance. Photo by Ian Freimuth.

Semi-Urban Residents Cycle More

One study reports that a 25 percent modal shift from cars to motorcycles can eliminate congestion entirely. Photo by Jean-Etienne Minh-Duy Poirrier.

Boulder, Colo. is the U.S. metropolitan area with the happiest residents, according to a 2010 Gallup and Healthways survey. Photo by Shihmei Barger.

Rio de Janeiro unveiled the first station of its forthcoming bus rapid transit system, which conntects Barra da Tijuca (pictured above) to other city neighborhoods. Photo by Rodrigo Soldon.

Does France's Autolib electric vehicle sharing system offer us a glimpse of the future? Photo by Francisco Gonzalez.

A new report by the WHO finds the immediate health benefits of active transport in combination with public transit to be greater than other greenhouse gas (GHG) mitigating transport options. Photo by Kyle Gradinger.

A new study by the Transportation Research Board examines how transit agencies use mobile devices to communicate real-time transit information. Photo by PatrickYHC.