Video and Non-video Feedback Interventions for Teen Drivers

Reyes, M. L.; McGehee, D. V.; Jenness, J. W.; Riegler, K. · 2016 · ROSA P / United States. National Highway Traffic Safety Administration

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Summary

This study evaluated the effectiveness of in-vehicle feedback technologies in reducing unsafe driving behaviors among newly licensed teen drivers, specifically comparing interventions that included video feedback against those that did not. The research was motivated by evidence that while monitoring technologies can reduce risky driving, privacy concerns often deter parents and teens from adopting systems that utilize video recording. The primary objectives were to determine the extent to which these interventions reduced unsafe driving relative to a baseline period and a control group, and to assess whether the inclusion of video produced significantly different outcomes compared to non-video feedback. The study employed a randomized controlled design involving two diverse cohorts: 32 teens from a rural site in Iowa and 28 from a suburban site in Maryland. Participants were randomly assigned to one of three conditions: video feedback, non-video feedback, or a control group. A DriveCam video event recorder was installed in each vehicle for 20 weeks, capturing 12-second video clips when lateral or longitudinal acceleration exceeded ±0.50g. The study consisted of a 4-week baseline period where no feedback was provided, followed by a 16-week intervention phase. During the intervention, the video group received weekly reports with detailed descriptions of events and a CD containing video clips, while the non-video group received reports with event types and counts but no video content. Both intervention groups received real-time LED feedback. The control group received no feedback. Video coders classified events as unsafe driving, appropriate responses, or invalid triggers. Results indicated that both intervention conditions significantly reduced unsafe driving behaviors. The event rate, defined as the number of unsafe driving events per 1,000 miles driven, decreased significantly over time for the intervention groups. By the end of the study, the event rate for intervention participants was 66% lower than the baseline rate. In contrast, the event rate for the control group did not change significantly and remained approximately six times higher than that of the intervention groups. Crucially, there were no statistically significant differences in event rates between the video and non-video feedback groups. Both interventions reduced unsafe driving to a similar degree across both rural and suburban sites. The study concludes that video feedback is not necessary to achieve significant reductions in unsafe driving behaviors among teen drivers; non-video feedback interventions are equally effective. This finding has important implications for the design and adoption of monitoring technologies, suggesting that systems without video can mitigate privacy concerns while still providing substantial safety benefits. A noted limitation is that teens in the non-video condition were aware they were being video recorded, which may have influenced their behavior. Future research should compare these findings with devices that do not employ video cameras at all to isolate the effect of video awareness.

Key finding

The event rate for teens in the intervention conditions decreased over time and was 66% lower at the end of the study relative to the baseline segment, while the control condition's event rate remained about six times greater than the intervention condition.

Methodology

naturalistic

Sample size: 68

Provenance

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

Topics

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• parental management
• passenger effects
• gamification driving
• in vehicle coaching
• telematics ubi feedback
• novice drivers

Information type

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