An Evaluation of Intensive Supervision Programs for Serious DWI Offenders

Wiliszowski, C.; McKnight, S.; Tippetts, S.; Fell, J. · 2011 · ROSA P / United States. National Highway Traffic Safety Administration

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Summary

This report evaluates the effectiveness of Intensive Supervision Programs (ISPs) for serious Driving While Intoxicated (DWI) offenders, addressing the need to reduce recidivism among repeat offenders. While research suggests that extended contact with sanctioning agencies reduces re-offending, few rigorous evaluations of ISPs existed. The study aimed to document eight distinct ISP models across the United States and conduct impact evaluations on three of them to determine their efficacy in preventing repeat DWI arrests. The methodology involved compiling case studies for eight programs: two state-level systems (Nebraska and Wisconsin), four individual area programs (Minnesota, Nevada, New York, and Oregon), and two rural programs (South Dakota and Wyoming). These programs shared common features, including offender screening, close monitoring, encouragement of compliance, and jail sanctions for noncompliance. The authors conducted impact evaluations on three specific programs: the Staggered Sentencing Program in Minnesota, the DWI Enforcement Program in Westchester County, New York, and the DUII Intensive Supervision Program (DISP) in Oregon. Using Cox Regression survival analyses, the study compared ISP participants against stratified, matched comparison groups, adjusting for covariates such as age, sex, and prior offenses. Data sources included state DMV records and criminal justice databases, with sample sizes ranging from 200 offenders in Minnesota to over 173,000 comparison drivers in New York. The findings demonstrated that all three evaluated programs significantly reduced DWI recidivism. The Minnesota program achieved a 30.6% lower recidivism rate up to four years post-offense, preventing an estimated 15 to 23 re-arrests. The Oregon DISP showed the strongest results, with a 54.1% lower recidivism rate up to eight years post-offense, preventing 67 re-arrests. The New York program was effective in the short term, showing an 18.1% lower recidivism rate within five years, but this effect diminished in the long term, with only a 5.4% reduction observed over 15 years. The report concludes that ISPs offer a favorable benefit-to-cost ratio, as preventing re-arrests saves thousands of dollars in sanctions and rehabilitation costs. The study highlights that intensive supervision, particularly when combined with judicial involvement and strict compliance monitoring, is a viable strategy for managing serious DWI offenders.

Key finding

Intensive Supervision Programs significantly reduced DWI recidivism rates, with the Oregon DISP showing a 54.1% lower recidivism rate over eight years and the Minnesota program showing a 30.6% lower rate over four years compared to matched control groups.

Methodology

mixed_methods

Provenance

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Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

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• dui enforcement

Information type

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• Applied Guidance: countermeasure evaluation