This report provides a summary analysis of bicycle injury collisions in San Francisco for the 2009 calendar year. The report also includes collision data from 1999 through 2009 so that the SFMTA can identify and track bicycle injury collision trends that have emerged over the past decade. Analysis of bicycle collisions provides a strong indication of roadway behaviors that negatively impact bicyclists’ safety; can help identify which violations should be prioritized for increased education and enforcement; assists with the planning of new bicycle facilities; and, provides safety education opportunities.