United States Department of Transportation
i
Evaluation of the New Mexico Ignition Interlock Program
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2010-11-01
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[PDF-2.26 MB]
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Edition:Final report; Aug. 2004-Nov. 2008.
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Abstract:This Evaluation of the New Mexico Ignition Interlock Program begins by summarizing the development of alcohol ignition interlock devices, laws, and programs during the past 22 years. It then reviews the laws that were written in New Mexico from 1999 to 2005. It goes on to characterize current penetration of interlocks relative to alcohol-related risk indicators, followed by detailed methodological reports on eight studies undertaken to understand the effects of several aspects of the New Mexico laws. The eight studies include (1) an evaluation of recidivism among court-mandated offenders who were required to install interlocks but were not allowed to drive those cars; (2) an evaluation of recidivism differences of first-time offenders who installed interlocks relative to matched offenders who did not; (3) an evaluation of the effect of an interlock licensing law that allows revoked DWI offenders to install an interlock on an insured vehicle and drive that way during the remainder of their revocation period; (4) an evaluation of a strong mandate in Santa Fe County during a 2-year period in which electronically monitored house arrest was required for offenders who did not want to have an interlock or claimed no plan to drive; (5) an evaluation of the patterns of elevated BAC tests by hour of the day and day of the week from among the more than 10 million New Mexico breath tests collected by interlock devices; (6) a comparative evaluation of predictors of recidivism including prior DWI, measures of drinking from the interlock event record, age, and other predictors; (7) a report on an interview process that included key informants, such as judges, prosecutors, defense attorneys, and probation officers, who manage or administer the interlock program; and (8) a report on focus group findings with interlock-using DWI offenders. Each of the eight studies is reported with Methods, Results, and Comments sections. The conclusion summarizes key findings and places the New Mexico results in the larger context of the national effort to reduce impaired-driving-related injuries and deaths. This report begins with an executive summary that touches on all these topics, including key findings, lessons learned, and potential areas for improvement of the New Mexico program.
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