Vehicle Interlock Programs

SUMMARY People convicted of drunk-driving offenses have an 80% higher likelihood of being involved in fatal crashes. License suspension is an effective but incomplete sanction as many offenders continue to drive unlicensed. Breath alcohol ignition interlock devices, which require a low alcohol breath sample before a car will start, hold promise for the control of some drunk driving offenders. Evidence shows these devices are effective while installed on the cars of those who elect to install them, but that elective use is still low, and even if installed recidivism rates climb once the interlock period is completed. This paper reviews interlock program problem areas and presents a plan for a brief intervention/case management program which is currently being tested in Alberta, Canada.