Seat belts save lives. Worn properly, they prevent you from being thrown around the inside of a crashing vehicle or, worse, thrown through the windshield and flung completely out of the vehicle. NHTSA statistics reveal that more than half of all accident fatalities were people who weren't using seat belts [source: NHTSA]. The numbers are much scarier for young drivers and passengers: A staggering 70 percent of fatal crash victims between the ages of 13 and 15 weren't wearing seat belts.
Everyone has heard horror stories about people who were killed in bizarre freak accidents in which they'd have lived if only they hadn't been wearing a seat belt. Even if these stories are true -- many of them are exaggerations or urban legends -- they're also anomalies. In the overwhelming majority of car crashes, you have a greater chance of surviving if you're wearing a seat belt.
Even a low-speed crash can send an unbelted person careening into the dashboard or side window, resulting in severe head injuries or broken bones. At higher speeds, the possible fates of the unbelted occupant are gruesome: severe lacerations from being propelled through the windshield; struck by other cars because you landed on the road; slammed into a tree or a house at 50 mph (80 kph). Sound scary? Then buckle up.