Waiting for the light to change in Portland, Oregon

Photo by Jonathan Maus, Bike Portland

Crossing Atlantic Avenue in Brooklyn, New York

Photo by NYCDOT

The bicycle bridge between Playa del Rey and Marina del Rey in Los Angeles, California

Photo by Richard Risemberg, Bicycle Fixation

Bike shuttle across the San Francisco - Oakland Bay Bridge

Photo by Alexander

Bike traffic on the Broadway Bridge heading into downtown Portland, Oregon

Photo by Jonathan Maus, Bike Portland

On the campus of Stanford University, Palo Alto, California

Photo by Daniel Jacobson

A platoon of cyclists heading from Center City to West Philadelphia

Photo by Kyle Gradinger, BCGP

A ferry for Governors Island, New York, packed with bikes

Photo by Benjamin Running

Crowded bike car on Caltrain

Photo by Richard Masoner, Cyclelicious

Sharing the road in Portland, Oregon

Photo by Dave Feucht, Portlandize

On the Williamsburg Bridge, New York City

Fixie kids arriving at a gallery show in Venice, California

Photo by Richard Risemberg, Bicycle Fixation

Multimodal transportation in Coronado, California

Photo by Bike by the Sea