Here a Door , There a Door, everywhere a Door Door

"People have been injured and even killed by riding in what is ostensibly a ‘safe’ space. Suddenly a door opens in front of them and they either have to swerve into motor traffic or hit the door itself."
Photo: Joshua Hart

San Fransisco Streetsblog, by Joshua Hart states that "getting ‘doored’ is the single most common cause of injury by motor vehicle users to people riding bikes in San Francisco."

This concerns me as the picture could just as easily be in Baltimore as San Fransisco. Elsewhere on the net center lane placement of Sharrows are being discussed. Why? Glad you asked (slides by Dan Gutierrez.)