Alcohol involvement in fatal traffic crashes 1998

NHTSA · 2001 · ROSA P / United States. Department of Transportation. National Highway Traffic Safety Administration

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Summary

This report by the National Highway Traffic Safety Administration (NHTSA) analyzes alcohol involvement in fatal traffic crashes in the United States during 1998, utilizing data from the Fatality Analysis Reporting System (FARS). The study addresses the magnitude of drunk driving as a factor in fatalities and examines trends from 1982 to 1998. Because BAC testing rates were incomplete, the NHTSA employed a discriminant analysis model to estimate BAC levels for drivers and nonoccupants lacking test results, classifying participants into sober (0.00), impaired (0.01–0.09), or intoxicated (0.10+) groups. The primary finding is that 30% of all traffic fatalities in 1998 involved at least one driver or nonoccupant with a BAC of 0.10 or greater, representing a 35% reduction from 1982 levels. Alcohol involvement varied significantly by crash type and time. Single-vehicle crashes had the highest alcohol involvement rate (40%), particularly on weekend nights when 66% of fatally injured drivers were intoxicated. In contrast, only 19% of multi-vehicle crashes involved an intoxicated participant. Nonoccupant crashes showed a 36% involvement rate, with nonoccupants themselves being more likely to be intoxicated (29%) than the drivers involved in those crashes (11%). Demographic analysis revealed distinct patterns in alcohol involvement. Male drivers were twice as likely as female drivers to be intoxicated in fatal crashes (20% vs. 10%). The highest intoxication rates occurred among drivers aged 21 to 24 (28%), followed by those aged 25 to 39 (25%). Vehicle type also influenced risk; motorcycle drivers exhibited the highest intoxication rate (30%), compared to 20% for light truck/van drivers and 18% for passenger car drivers. Longitudinal data from 1982 to 1998 indicated substantial reductions in intoxicated drivers across most vehicle classes, with heavy truck drivers seeing a 75% reduction and medium truck drivers a 60% reduction, while motorcycle drivers saw a smaller 27% reduction. The report concludes that while alcohol involvement in fatal crashes has declined significantly over the studied period, it remains a critical safety issue, particularly during nighttime hours, on weekends, and in single-vehicle incidents. The data highlight specific high-risk groups, including young adult males and motorcycle operators, providing evidence for targeted countermeasures. The findings underscore that alcohol impairment is disproportionately associated with single-vehicle crashes and specific temporal contexts, suggesting that enforcement and prevention efforts should focus on these high-risk scenarios.

Key finding

Thirty percent of all traffic fatalities in 1998 occurred in crashes involving at least one driver or nonoccupant with a blood alcohol concentration of 0.10 or greater.

Methodology

dataset

Sample size: 41501

Provenance

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

Topics

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• alcohol
• demographic disparities
• sex gender
• comparative international
• 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).

• Empirical Findings: crash risk outcomes