Managing Heavy Drinking to Avoid Impaired Driving: A Study of Interlock Users

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This study will collect self-report, biological, and official record data on the drinking and the driving of 300 first DWI offenders sentenced to 6 months on the interlock.

Data will be collected covering the 3 months before the interlock is installed, the 6 months when the interlock is on the vehicle, and the 3 months following its removal. The Timeline Followback (TLFB) method will be used to build detailed scenarios of drinking-driving practices in each of those periods. Knowledge about how participants change their drinking and/or driving behaviors to order to start their cars will be useful to treatment specialists, probation officers, and interlock providers who deal with DWI offenders. More significantly, these results will provide a basis for developing interventions that extend the safety benefits of the altered drinking-driving behaviors adopted while on the interlock into the period following interlock removal.

Principal Investigator: Thomas H. Nochajski
Funding Source: Pacific Institute for Research and Evaluation
Funding Period: Sept. 1, 2014 - Sept. 31, 2019
Funding Amount: $795,451 (UB Portion)