Interlock Data Utilization [Report]
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Summary
This 2017 report by the National Highway Traffic Safety Administration (NHTSA) addresses the utilization of data from alcohol ignition interlock devices to monitor driving while impaired (DWI) offenders. The study was motivated by the need to determine how interlock data is currently used for offender monitoring, screening, and treatment, and whether this data can effectively reduce alcohol-impaired driving recidivism. While interlocks significantly reduce recidivism while installed, benefits often disappear after removal, suggesting a need to better integrate data monitoring with treatment interventions. The researchers conducted an exploratory, descriptive study focusing on nine U.S. states with large interlock populations: Arizona, Colorado, Florida, Illinois, Maryland, North Carolina, New Mexico, Texas, and Washington. Data were collected through discussions with key informants, site visits to Florida and Colorado (selected for their unique integration of data and treatment), and reviews of public sources and interlock publications. The study analyzed interlock laws, data reporting formats, violation definitions, and monitoring procedures across these jurisdictions to identify common practices, challenges, and opportunities for improvement. The findings reveal substantial heterogeneity in how states and courts utilize interlock data. There is a lack of uniformity in report formats and violation definitions due to varying state laws and the operational differences among multiple interlock vendors. Most states use interlock data primarily to detect procedural violations or persistent lockouts, often resulting in extensions of the interlock installation period. However, few jurisdictions effectively link interlock performance to treatment needs. The report highlights Florida and Colorado as exceptions, noting their efforts to integrate interlock logs with alcohol abuse treatment programs. Florida uses a "medical model" where treatment is triggered by interlock problems, while Colorado offers enhanced counseling to all participants. The study also identifies significant barriers to effective data use, including inconsistent vendor reporting, limited data sharing between courts and licensing agencies, and a lack of training for treatment providers in interpreting interlock reports. The report concludes that while interlock data is widely used, its potential for reducing long-term recidivism is underutilized due to administrative fragmentation and inconsistent definitions. The authors recommend standardizing interlock data vocabulary and report formats, automating data delivery to central databases, and expanding data access for treatment professionals. They emphasize the need for better coordination between sanctioning and treatment programs, suggesting that linking interlock performance to therapeutic interventions could address the underlying drinking problems of offenders. The report calls for further research to evaluate the effectiveness of these integrated approaches and to determine the most cost-effective methods for monitoring and utilizing interlock data.
Key finding
Interlock data is widely used to extend installation periods for non-compliant users, but offenders often do not reduce their alcohol consumption while on the device, indicating that current monitoring does not address underlying drinking problems.
Methodology
mixed_methods
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_rosap on 2026-05-23 (6 acquisition events logged).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | rosap | — | — | 2 | 2026-05-23 |
| archive | success | — | — | — | 1 | 2026-05-23 |
| extract | success | cached | — | — | 2 | 2026-06-10 |
| clean | success | — | — | — | 1 | 2026-06-01 |
| chunk | success | — | — | — | 1 | 2026-06-01 |
| embed | success | — | — | — | 1 | 2026-06-02 |
| enrich | success | — | — | — | 1 | 2026-05-23 |
| promote | success | — | — | — | 1 | 2026-05-23 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 3 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 19 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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- Applied Guidance: countermeasure evaluation