Why teen driving deaths have tumbled to historic lows
US traffic deaths for all age groups continue to plunge at a record-shattering pace. An estimated 32,310 people died in traffic accidents in 2011, marking a 1.7 percent year-over-year decline and a seven-year downward trend, according to the National Highway Traffic Safety Administration. The number of road deaths is the lowest since record keeping began in 1949, well before the creation of the American highway system.