Strategies for Increasing Ignition Interlock Use among DWI Offenders

Alcohol ignition interlock devices are increasingly used as a sanction for Driving While Impaired (DWI), with as many as 318,714 interlocks across the country. Yet, with the number of persons arrested for DWI upwards of a million individuals, the percent of DWI offenders using interlocks is relatively low. Increasing interlock use is a worthy safety goal because interlocks are a proven means of reducing the number of alcohol-impaired driving trips. This project will evaluate different strategies for increasing interlock use by working with an interlock program that has implemented a strategy to determine whether the strategy is effective. The objective is to develop guidelines and lessons learned of value to interlock programs. The project data will address the following questions: (1) Was there an increase in interlock use by DWI offenders change after a State or jurisdiction deployed a new program or strategy? (2) What factors facilitated interlock use?(3) What factors hindered interlock use? (4) What are the lessons learned about deploying the program or strategy?


    • English


    • Status: Active
    • Funding: $247098
    • Contract Numbers:


    • Sponsor Organizations:

      National Highway Traffic Safety Administration

      1200 New Jersey Avenue, SE
      Washington, D.C.  United States  20590
    • Project Managers:

      Wochinger, Kathryn

    • Performing Organizations:

      Pacific Institute for Research and Evaluation

      11720 Beltsville Drive, Ste 900
      Calverton, MD  United States  20705-3111
    • Start Date: 20140901
    • Expected Completion Date: 20200930
    • Actual Completion Date: 0
    • USDOT Program: Behavioral Safety Research
    • Subprogram: Alcohol Impaired Driving

    Subject/Index Terms

    Filing Info

    • Accession Number: 01625569
    • Record Type: Research project
    • Source Agency: National Highway Traffic Safety Administration
    • Contract Numbers: DTNH22-14-C-00395
    • Files: RiP, USDOT
    • Created Date: Feb 6 2017 3:23PM