Moving beyond teen crash fatality statistics : the go-team study.

McGehee, Daniel V.; Reyes, Michelle L.; Carney, Cher · 2013 · ROSA P / Iowa. Dept. of Transportation

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Summary

This study addresses the persistent issue of motor vehicle crash (MVC) fatalities among teen drivers in Iowa, which remain the leading cause of adolescent death despite a decade-long downward trend. Motivated by the need to move beyond aggregate statistics, the researchers conducted the "Go-Team Study" to create detailed case studies of every fatal crash involving a driver under age 20 in Iowa between 2009 and 2011. The goal was to identify specific risk factors, contributing behaviors, and demographic patterns to inform safety interventions, particularly in the context of Iowa’s Graduated Driver Licensing (GDL) system, which lacks strict nighttime and passenger restrictions. The methodology involved gathering comprehensive data from media sources, law enforcement agencies, the Iowa Department of Transportation, and court records. The study analyzed 126 fatal crashes involving 131 teen drivers, resulting in 143 fatalities. Researchers compiled detailed case studies for each incident, including crash narratives, occupant details, license history, prior traffic citations, and criminal charges. Data were analyzed to determine crash types, time of occurrence, driver contribution to the crash, and the influence of factors such as speed, impairment, and seat belt usage. Exposure was estimated using national vehicle miles traveled (VMT) data to adjust crash rates by age and gender. Key findings indicate that teen drivers contributed to 74% of the fatal crashes they were involved in. While raw crash involvement increased with age, the crash rate per VMT was highest for 15-year-olds and decreased steadily thereafter. Male drivers were overrepresented, comprising 63% of teen drivers in fatal crashes; notably, 16-year-old males had a fatal crash involvement rate 2.5 times higher than females. Single-vehicle road departures were the most common crash type (41%), particularly among younger drivers, likely due to inexperience, while older teens’ road departures were frequently linked to alcohol or drug impairment. Speeding and impairment were each factors in approximately 25% of crashes where the teen was at fault. Crashes peaked between 2–6 pm and 12–4 am, with nearly 40% occurring on weekends. Seat belt usage was low, with only 20% of rear-seat occupants buckled compared to 60% of front-seat occupants. Prior speeding violations and at-fault crashes were associated with subsequent fatal crash involvement. The study concludes that reducing teen MVC fatalities requires targeted interventions addressing inexperience, impairment, speed, and seat belt compliance. The authors suggest that families should increase supervised driving hours for new drivers and restrict independent driving to lower-risk situations, such as daylight hours and direct routes. Limiting the number of passengers for newly licensed drivers is also recommended, given the association between high occupancy and single-vehicle crashes. Furthermore, addressing poor driving habits immediately after a teen receives a violation or is involved in a crash could prevent future fatal incidents. These findings highlight the limitations of Iowa’s current GDL system and underscore the need for stricter restrictions on nighttime driving and passengers.

Key finding

Teen drivers contributed to 74% of fatal crashes in the study, with single-vehicle road departures, speeding, and impairment being the most prevalent contributing factors.

Methodology

dataset

Sample size: 131

Provenance

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

Topics

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• sex gender
• passenger effects
• demographic disparities
• novice drivers
• incidence prevalence
• fatality injury trends

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).

• Empirical Findings: crash risk outcomes, observational prevalence