I don't like to tempt fate, so I'll just say that in over 30 years of commuting, any incidents with vehicles have been extremely rare. I get a honk now and then, something thrown at me (or maybe just near me by coincidence) once in a blue moon, had one guy recently try to attack me when he passed me in the snow, lost control of his car and wrecked. Incidents are rare for the most part...but you tend to hear about them more often here in BF because we are a small community of nothing but cyclists. We also have some cyclists who don't have the best manners, respect for others or respect for the law and sometimes bring things on themselves. We also have some folks who ride agressively in heavy urban traffic, which is always an adventure and a blast...but the odds sometimes catch up.
If you ride predictably and courteously, paying attention to everything going on around you and planning for Murphy, you'll be fine and enjoy yourself 99% of the time.
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"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey