The Bay Citizen has created a handy new interactive map pinpointing all of the reported bike accidents that occurred in San Francisco during the past two years. Crashes reported to SFPD increased from 555 in 2009 to 602 in 2010. They note that many accidents don't get reported. So, help them out by adding yours to the map.
Bay Citizen also published a bunch of in-depth data that tries to make sense out of the accidents. They found that most of the neighborhoods with major biking thoroughfares, such as The Mission SoMa, and Downtown had the highest number of crashes. Naturally, Market Street had 139 accidents in the last two years, significantly more than any other street.
Keep an eye out for those trouble zones, and stay safe, folks!