Figure 1. BACs of Drivers in National Surveys

  1973 1986 1996 2005
.000 64% 74% 83% 85%
.005-.049 22% 18% 9% 9%
.050-.079 9% 5% 5% 4%
.080+ 5% 3% 3% 2%

Figure 2. National Roadside Survey Pilot Test Primary Sampling Unit Locations

Los Angeles, California
Gilpin County and Jefferson County, Colorado
Douglas County, Nebraska
Bibb County and Tuscaloosa County, Alabama
Wake County, North Carolina
Ocean County, New Jersey

Figure 5. BACs of Drivers in National Surveys

  1973 1986 1996 2005
.000 64% 74% 83% 85%
.005-.049 22% 18% 9% 9%
.050-.079 9% 5% 5% 4%
.080+ 5% 3% 3% 2%

Figure 6. 2005 Pilot BACs with New Categories

  %
.000 85.5%
.005-.049 8.9%
.050-.079 3.0%
.080+ 2.6%

Figure 7. Pattern of BAC Test Results by Biological Matrix

 

Figure 8. Blood Alcohol Concentrations of Drivers in National Surveys

  1973 1986 1996 2005
.000 64% 74% 83% 85%
.005-.049 22% 18% 9% 9%
.050-.079 9% 5% 5% 4%
.080+ 5% 3% 3% 2%