Brazil's newest law will direct 15 percent of revenue from traffic fines towards programs that encourage bicycling. Photo by marcel maia.

In some parts of the world overcrowded, informal public transportation leave women in vulnerable conditions. Photo by GrahamKing.

Need to make a quick run from the U.S. Capitol to Ben’s Chili Bowl on U Street by bike? HopStop stays you'll burn 165 calories and save 2.97 pounds of carbon emissions. Photo by James D. Schwartz.

"Revolutionary" Hubway riders outside of Paul Revere's House in Boston. Photo by City of Boston.

David Byrne, former frontman for the Talking Heads, is touring Latin America to raise awareness for bicycling. Photo by Mauricio Macri.

This bike was "grown" through a process of grafting bamboo. Photo via James Dyson Award.

A 60 percent increase in fatal cycling accidents serves as an alarming realization of the need for cycling infrastructure. Photo by Jesse Millan.