If you're an involved cyclist in San Francisco, you no doubt already know of this survey.
The San Francisco Senior Action Network is conducting a survey to understand why cyclists ride on the sidewalk in San Francisco. Sidewalk cyclists who have taken the survey so far say they would avoid the sidewalk if more bike lanes were available, if traffic laws were better enforced, and if there were a separate set of traffic laws for cyclists. In a pedestrian survey, 10% of pedestrians answering the survey indicate they have been hit by a cyclist on the sidewalk in the last two years.
If you're a cyclist in San Francisco, you can take the sidewalk cyclist survey here.