SACRAMENTO, Sept. 14 (UPI) -- U.S. graduated driver licensing programs reduce fatal crashes by 16-year-old drivers but are linked to more fatal crashes in 18-year-olds, researchers say.
Scott V. Masten of the California Department of Motor Vehicles in Sacramento and colleagues analyzed quarterly data from 1986 to 2007 of the incidence of fatal crashes involving drivers ages 16-19 in all 50 states and the District of Columbia.