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The Alberta Interlock Program: the evaluation of a province-wide program on DUI recidivism
R B Voas1, P R Marques, A S Tippetts
1Public Services Research Center, Pacific Institute for Research and Evaluation, Landover, Maryland 20785, USA.
Addiction (Abingdon, England)
|March 16, 2000
Summary
Alcohol safety interlocks significantly reduce driving-under-the-influence (DUI) recidivism while installed. However, low participation rates limit the overall effectiveness of interlock programs for DUI offenders.
Area of Science:
- Public Health
- Transportation Safety
- Criminology
Background:
- Driving-under-the-influence (DUI) remains a significant public safety concern.
- Alcohol safety interlocks are devices aimed at preventing DUI offenses by requiring a breath sample before a vehicle can start.
- The effectiveness of interlock programs, particularly concerning offender participation rates, requires thorough evaluation.
Purpose of the Study:
- To assess the efficacy of alcohol safety interlocks in reducing DUI recidivism among first and second-time offenders.
- To evaluate the overall impact of interlock programs on DUI offender management, considering limited participation.
Main Methods:
- A province-wide study in Alberta, Canada, analyzed driving records of 35,132 DUI offenders from 1998 to 1996.
- Driving records of offenders who participated in interlock programs (6 months for first, 2 years for second offenders) were compared to non-participants.
- The primary measurement was repeat DUI offenses during and after the interlock period.
Main Results:
- A substantial reduction in DUI recidivism was observed while offenders had interlocks installed.
- Post-interlock removal, DUI rates returned to levels similar to non-participant offenders, indicating temporary effectiveness.
- Low program uptake, with only 8.9% of eligible drivers participating, limited the overall impact on provincial DUI management.
Conclusions:
- Alcohol safety interlocks are effective in reducing DUI recidivism when actively used by offenders.
- The limited voluntary participation in interlock programs significantly curtails their broader effectiveness in reducing overall DUI recidivism rates.
- Policy considerations may be needed to increase interlock program participation for greater public safety impact.
