Study of recidivism rates among drivers administratively sanctioned by the New Jersey motor vehicle commission : final report, December 2009.

Carnegie, Jon A.; Strawderman, William Edward; Li, Wei · 2009 · ROSA P / New Jersey. Dept. of Transportation

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Summary

This study evaluates the effectiveness of New Jersey’s negligent driver countermeasures in reducing violation and crash recidivism. Motivated by the high public safety risk posed by repeat traffic offenders and the lack of empirical evidence regarding the efficacy of New Jersey’s specific interventions, the research aimed to assess how well administrative sanctions alter driver behavior. The study also examined the current state of driver improvement practices across the United States to contextualize New Jersey’s approach. The methodology involved a national literature review and a survey of motor vehicle agency policies in other states to document prevailing practices. The core analysis utilized an extensive longitudinal database of New Jersey driver history records. Researchers compared violation and crash rates in the two-year period before and after drivers received specific interventions. The study focused on three primary countermeasures: point advisory notices (often accompanied by negligent driver fees for experienced drivers), driver re-education classes (accompanied by point credits and one-year probation), and license suspension (accompanied by one-year probation). The analysis stratified results by driver subgroups, including teen, young, and older drivers, as well as by gender. The findings indicate that New Jersey’s countermeasures are generally effective at reducing recidivism. License suspension combined with one-year probation yielded the greatest overall reduction in both mean violation and crash rates across all driver subgroups, with violation reductions ranging from 59% to 70% and crash reductions from 31% to 56%. Driver re-education classes resulted in the lowest mean violation rate reductions, though they were statistically significant for all subgroups. Point advisory notices accompanied by negligent driver fees proved effective for young and older drivers, reducing violations by 29% to 65%. However, these notices were ineffective for teen drivers, particularly males, whose violation rates increased by 12% post-intervention. Teen male drivers exhibited the highest baseline recidivism rates, with violation rates 800% to 2,100% higher than other subgroups when normalized for exposure. The study concludes that while New Jersey’s program is effective, specific reforms are necessary. The authors recommend considering a "zero-tolerance" policy or earlier license suspension for teen drivers, as current interventions fail to significantly reduce their recidivism. Additionally, the complex structure of the license suspension program should be streamlined for easier administration. Finally, the authors urge a review of plea bargaining practices, noting that an increase in zero-point plea bargains may allow repeat offenders to avoid corrective actions, thereby undermining safety outcomes. The authors caution that some observed improvements may be attributed to regression-to-the-mean effects, as the study lacked a true control group.

Key finding

License suspension combined with one-year probation resulted in the greatest overall reduction in both mean violation and crash rates among negligent driver subgroups.

Methodology

dataset

Provenance

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

Topics

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• driver education effectiveness
• sex gender
• novice drivers
• incidence prevalence

Information type

What kind of knowledge this paper contributes, grouped by family — independent of topic (what it is about) and method (how it was studied).

• Applied Guidance: countermeasure evaluation
• Empirical Findings: crash risk outcomes, observational prevalence