The sound of a car door opening in front of you is similar to the sound of a gun being cocked. - Amy Webster, cyclist.
Debate can get heated and sometimes nasty on who to blame for these deaths - especially between motorists and cyclists, each faction blaming the other for careless and arrogant road use. Research into the issue suggests that drivers are usually (not always, but usually) at fault. An analysis of New York cyclist fatalities in 2000, for instance, found that 75% were caused by motorist traffic violations. Not that fault really matters when motorised and non-motorised collide: the latter always loses.