D.C.

The arrival of dockless bike-share is changing the cycling landscape in some American cities. Dallas, for instance, may not be known for its bikeability, but it now has thousands of public bicycles available at very low cost.

DoBi is handy and fun to use, but it needs to be carefully regulated before it debuts in Chicago.

In cities that already have established bike-share systems, can new companies complement existing options in a way that improves service for the public?

With a "parking cash out" policy, employers who provide employees with parking benefits also give the equivalent value in cash to workers who don't car commute. Now a version of that idea has been introduced in the DC Council by members Charles Allen, Mary Cheh, and Brianne Nadeau.

There are now nearly 16 miles of protected bike lanes in Washington, DC.

This PSA from Montgomery County, Maryland, has got to be one of the all-time worst examples of pedestrian shaming. The young girl with tire treads across her face, it's implied, was struck and killed by a driver because she was "wearing black."

A new survey [PDF] by researchers at UC Berkeley and published in Access Magazine sheds light on how bike-share systems interact with transit.

Michael Andersen blogs for The Green Lane Project, a PeopleForBikes program that helps U.S. cities build better bike lanes to create low-stress streets. Second in a series.

Washington, DC, has the same "vision zero" goal to eliminate traffic deaths as Chicago. In this new public service announcement, DC police chief Cathy Lanier says, "High speed collisions are much more deadly than other collisions." Exactly. When you compare the severity of injuries that pedestrians suffer in speeding-related crashes to non-speeding crashes, you see what Lanier is talking about.