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Adrian Lund, President

Alcohol Ignition Interlocks and the Prevention of Alcohol Impaired Driving. National Highway Traffic Safety Administration Meeting on Use of Alcohol Ignition Interlocks for Reducing Impaired Driving Recidivism. Washington, DC  August 22, 2007. Adrian Lund, President.

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Adrian Lund, President

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  1. Alcohol Ignition Interlocks and the Prevention of Alcohol Impaired Driving National Highway Traffic Safety Administration Meeting on Use of Alcohol Ignition Interlocks for Reducing Impaired Driving Recidivism Washington, DC  August 22, 2007 Adrian Lund, President

  2. 0.08 g/dL or more 0.15 g/dL or more Percent of fatally injured drivers with BACs at or above 0.08 g/dL and 0.15 g/dL, 1982-2005 1982 85 90 95 2000 05

  3. Percent of fatally injured drivers with BACs at or above 0.08 g/dL, 2005By gender and age

  4. The Contribution of Drinking Drivers to Motor Vehicle Crash Fatalities

  5. Relative risk of fatal crash involvement for passenger vehicle drivers, by BAC Zador et al., 2000 g/dL BAC

  6. Potential lives saved in 2005 if all driver BACs reduced to zeroBy highest driver BAC

  7. Potential lives saved in 2005 if driver BACs reduced to different BAC maximums

  8. What Role Does Recidivism Play?

  9. Motor vehicle crash deaths in 2005By DWI convictions in prior 3 years prior convictions

  10. Motor vehicle crash deaths involving drivers with DWI convictions in prior 3 yearsBy license status prior convictions

  11. Effects of Alcohol Interlocks on Recidivism

  12. Maryland alcohol interlock study, 1999 • Population: Drivers with multiple alcohol-related traffic offenses now eligible for license reinstatement • Study methods: Random assignment to interlock license restriction or to customary treatment program • Duration of study: Interlock assignment for one year. Offenders monitored for 2 years to assess effects when interlock on and when off • Interlock participation rate: about two-thirdsof interlock group had interlock installed for some part of the study period

  13. DUI re-arrest rate during first year of interlocks 64% reduction in alcohol traffic violations interlock groupn = 698 controlsn = 689

  14. DUI re-arrest rate during second year follow-upNo statistically significant difference interlock groupn = 681 controlsn = 643 (interlocks removed)

  15. Potential lives saved in 2005 if BACs of drivers with prior DWI convictions within 3 years limited to specified maximums

  16. Potential lives saved in 2005 if BACs of drivers with multiple prior DWI convictions within 3 years limited to specified maximums

  17. Alcohol ignition interlocks for drivers convicted of DWIPluses and minuses Pluses • Reduces recidivism by nearly 2/3 • Reductions might be higher if installation rates were greater • Fatal crash reductions • 600-800 if applied to first offenders • 100 if multiple offenders • Natural laboratory to test new technology that could be applied to general population • more than 8,000 deaths prevented if limit set at 0.08 g/dl Minuses • ?

  18. Minimum requirements of technologies that would be suitable for use in all vehicles • Small • Quick to use • Accurate • Reliable • Repeatable • Durable, robust • No or low maintenance • Virtually invisible to sober drivers

  19. Technology exists but is not easy or unobtrusive Tissue spectroscopy

  20. www.iihs.org For more information:

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