Alcohol involvement in fatal traffic crashes 1997

NHTSA · 2000 · ROSA P / United States. Department of Transportation. National Highway Traffic Safety Administration

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Summary

This report, published by the National Highway Traffic Safety Administration (NHTSA), analyzes alcohol involvement in fatal traffic crashes in the United States during 1997. The study aims to quantify the magnitude of drunk driving, identify circumstances associated with high alcohol involvement, and illustrate trends from 1982 to 1997. The research is motivated by the established link between alcohol impairment and fatal crashes, seeking to provide precise statistics to inform safety countermeasures. The data were abstracted from the Fatality Analysis Reporting System (FARS), which records all fatal traffic crashes. Because blood alcohol concentration (BAC) testing was not performed for all drivers and nonoccupants, the NHTSA employed a discriminant analysis model to estimate BAC values for those with unknown results. This method estimates unknown BACs based on known data for drivers with similar characteristics, such as sex, crash time, and vehicle type. BAC levels were categorized into three groups: 0.00 g/dl (sober), 0.01–0.09 g/dl (some alcohol), and 0.10+ g/dl (intoxicated). In 1997, 30% of all traffic fatalities occurred in crashes involving 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 a 40% alcohol involvement rate, compared to 20% for multi-vehicle crashes. Nighttime and weekend crashes showed higher intoxication rates; for instance, 54% of fatal crashes on weekend nights involved an intoxicated participant. Male drivers were twice as likely as female drivers to be intoxicated (20% vs. 10%). Drivers aged 21–24 had the highest intoxication rate (26%), followed by those aged 25–39 (24%). Motorcyclists exhibited the highest vehicle-class intoxication rate at 28%, compared to 20% for light truck drivers and 18% for passenger car drivers. The findings indicate a sustained decline in alcohol-related fatalities over the 15-year period, with significant reductions across all vehicle types, particularly heavy trucks (75% reduction). However, alcohol remains a critical factor in fatal crashes, especially during non-working hours and among young adult males. The report highlights that fatally injured drivers are more likely to be intoxicated than surviving drivers, suggesting a strong correlation between high BAC and crash severity. These statistics provide a baseline for evaluating the effectiveness of drunk driving countermeasures and identifying high-risk demographics and scenarios for targeted interventions.

Key finding

In 1997, 30 percent of all traffic fatalities involved at least one driver or nonoccupant with a blood alcohol concentration of 0.10 or greater.

Methodology

dataset

Sample size: 42013

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