My local motorists are so bad about overdriving their vision, also known as speeding under the basic speed law, that we recently had two ambulances totaled by morons, one while the ambulance was pulled over and the paramedics were rendering aid and another while it was moving slowly. (In the second incident, the moron died; never run into the people who can save your life.)
It's not so much that cyclists in particular need to watch out for poorly-skilled motorists. All road users are put at risk by these yoyos. Too bad we don't have some system of training and licensing motorists and removing those who cannot/will not obey the law from the drivers' seats.