I thought this was interesting concept, floating bike lanes. Useful on streets with part time parking such as Race St and Chestnut St. When parking is not allowed the area between the two solid stripes becomes a travel lane and the right side of the parking lane becomes a bikeable shoulder.
The study conducted by the San Francisco DOT is located here
The picture below is a floating bike lane along the Embarcadero in San Francisco. Note that door zone is marked with the parking hash marks.