From a Washington Monthly article entitled "Bumper Mentality":
"most Americans take it on faith that the only way to be safe on the highway is to be driving a tank. ... The occupant death rate in SUVs is 6 percent higher than it is for cars--8 percent higher in the largest SUVs. The main reason is that SUVs carry a high risk of rollover; 62 percent of SUV deaths in 2000 occurred in rollover accidents. ... SUV drivers--ever image-conscious and overconfident--seem to hate seat belts as much as they love talking on their cell phones while driving. Bradsher reports that four-fifths of those killed in roll-overs were not belted in, even though 75 percent of the general driving population now buckles up regularly. ... The "kill rate," as Bradsher calls it, for SUVs is simply jaw-dropping. For every one life saved by driving an SUV, five others will be taken. Government researchers have found that a behemoth like the four-ton Chevy Tahoe kills 122 people for every 1 million models on the road; by comparison, the Honda Accord only kills 21.Part of the reason for the high kill rate is that cars offer very little protection against an SUV hitting them from the side--not because of the weight, but because of the design. When a car is hit from the side by another car, the victim is 6.6 times as likely to die as the aggressor. But if the aggressor is an SUV, the car driver's relative chance of dying rises to 30 to 1, because the hood of an SUV is so high off the ground. Rather than hitting the reinforced doors of a car with its bumper, an SUV will slam into more vulnerable areas and strike a car driver in the head or chest, where injuries are more life-threatening.
Ironically, SUVs are particularly dangerous for children, whose safety is often the rationale for buying them in the first place. Because these beasts are so big and hard to see around (and often equipped with dark-tinted glass that's illegal in cars), SUV drivers have a troubling tendency to run over their own kids. Just recently, in October, a wealthy Long Island doctor made headlines after he ran over and killed his two-year-old in the driveway with his BMW X5. He told police he thought he'd hit the curb.
Because of their weight, shoddy brakes, and off-road tires, SUVs handle poorly in bad weather and have trouble stopping on slick roads. What's more, they're generally so poorly designed as not to be capable of carrying much cargo, despite the space. A contributing factor in the Ford Explorer-Firestone tire debacle was that drivers weren't told that their Explorers shouldn't carry any more weight than a Ford Taurus. The extra weight routinely piled in these big cars stressed the tires in a way that made them fall apart faster and contributed to the spate of rollover deaths. "