I knew very many bicyclists who were in accidents in NYC. Most, but not all, were caused by bikers behaving irresponsibly [[often weaving in and out of cars in slow traffic). Motorists need to respect bikers when their paths cross, but at the end of the day, it's not the motorists who get killed. I am in favor of bike lanes where they are feasible, but they are not a cure-all for bike safety.