Going green in the nation's capital could be dangerous for pedestrians.

As the old Washington Post building is being torn down in downtown Washington, pedestrians and bicyclists are being forced to compete for access. Since the construction zone has taken away the new bike lanes on 15th and L streets, the city made makeshift ones for cyclists. Pedestrians are supposed to cross the street to use the sidewalk on the other side.

Instead, many pedestrians are using the bike lane to get around the construction site, but they do so at their own peril.

A new sign near the Post's pedestrian no-fly zone reads: "Danger — Bike Lane Only Ahead," complete with a symbol featuring silouetted pedestrians in a circle crossed out in red.

The area in front of the construction zone is part of the Washington downtown bicycle pilot program. "The bike lanes are important in our objective of expanding transportation choices in the District and the region," according to the District's Department of Transportation.