Underage (Age Under 21) Drunk Driving Continues to Drop

The federal government's National Roadside Surveys of alcohol blood concentration (BAC) of drivers finds the proportion of drivers under the age of 21 who have a BAC of .08 or higher has dropped dramatically since 1973.

The proportion of drivers under age 21 with a BAC of .08 or higher was over six times higher in 1973 than in 2007, dropping from 5.5% to 0.9%.


  • Compton, Richard and Berning, Amy. Results of the 2007 National Roadside Survey of Alcohol and Drug Use by Drivers. Washington, DC: National Highway Traffic Safety Administration (NHTSA), National Center for Statistics and Analysis. Department of Transportation, DOT HS 811 175, July, 2009.

Filed Under: Drinking and Driving