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An evaluation of the Swedish ignition interlock program.

Bo Bjerre1

  • 1Traffic Medicine Advisory Board, Swedish National Road Administration, Borlänge, Sweden. bo.bjerre@vv.se

Traffic Injury Prevention
|October 8, 2005
PubMed
Summary

The Swedish alcohol ignition interlock program shows promising results for driving while intoxicated (DWI) offenders. Participants demonstrated reduced alcohol consumption and no recidivism during the program, suggesting improved road safety.

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Area of Science:

  • Public Health
  • Addiction Medicine
  • Traffic Safety

Background:

  • Driving while intoxicated (DWI) offenders exhibit high-risk behaviors predating offenses.
  • Pre-offense records indicate significantly elevated accident and hospitalization rates among DWI offenders.
  • Swedish DWI offenders often have pre-existing alcohol dependence or abuse issues.

Purpose of the Study:

  • To evaluate the effectiveness of the Swedish alcohol ignition interlock program for DWI offenders.
  • To assess the program's impact on alcohol consumption and recidivism rates.
  • To analyze the program's unique features, including strict medical oversight and focus on habit change.

Main Methods:

  • The study involved a voluntary pilot program for DWI offenders, including first-time and repeat offenders.

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  • Participants underwent a 2-year program with strict medical regulations and regular physician checkups.
  • Alcohol consumption was monitored using questionnaires (AUDIT) and biological markers.

    • Main Results:

    • Only 12% of eligible offenders participated; 60% were diagnosed with alcohol dependence or abuse.
    • A noticeable reduction in alcohol consumption was observed among interlock users.
    • No cases of recidivism were recorded during the program, and preliminary data suggest a reduced annual accident rate.

    Conclusions:

    • The Swedish alcohol ignition interlock program shows preliminary success in reducing alcohol consumption and preventing recidivism among DWI offenders.
    • High compliance rates and the program's focus on habit change likely contribute to its effectiveness.
    • The program's promising results have led to its expansion across Sweden and to all driver's license categories.