Drinking and Driving in the United States: The 1996 National Roadside Survey
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Summary
This report presents the findings of the 1996 National Roadside Survey, the third in a series of national studies (following 1973 and 1986) conducted to measure trends in drinking and driving in the United States. The study was motivated by the need to complement Fatality Analysis Reporting System (FARS) data, which tracks alcohol involvement in fatal crashes, with data on the prevalence of drinking drivers on the road. This combination allows for the calculation of relative crash risks and the assessment of national progress in reducing alcohol-related highway fatalities. The survey employed a four-stage sampling design to select weekend nighttime drivers (Friday and Saturday, 10 PM–12 AM and 1 AM–3 AM) across the 48 contiguous states. Researchers interviewed and breath-tested over 6,000 operators of private four-wheel vehicles, excluding commercial drivers and motorcyclists. Police officers directed vehicles to safe off-road locations where interviewers conducted brief surveys and administered breath tests using SD-400 devices. For drivers who refused or could not provide valid breath samples, Blood Alcohol Concentration (BAC) levels were imputed using passive alcohol sensor readings. The study achieved a 96% participation rate for interviews and a 95.7% rate for breath samples. The results indicated that the total proportion of drinking drivers declined by approximately one-third between 1986 and 1996. However, this reduction was driven entirely by a significant decrease in drivers with low BACs (0.01–0.049); there was no statistically significant change in the number of drivers with BACs at or above 0.05. Demographic analysis revealed that the proportion of female drivers on weekend nights increased significantly, and the rate of drinking among women rose relative to men. Drivers under age 21 showed a significant decrease in high BACs (≥0.10), dropping from 2.7% in 1986 to 0.3% in 1996. Conversely, the proportion of Hispanic drivers with BACs ≥0.05 increased, while African American drivers with high BACs decreased. Logistic regression confirmed that late-night driving and male gender remained significant predictors of high BACs, though the gender disparity narrowed. The study concludes that the decline in drinking drivers reflects a shift in social norms regarding driving after drinking rather than just reduced alcohol consumption. The significant reduction in underage drinking and driving supports the effectiveness of minimum legal drinking age laws. However, the lack of progress in reducing high-BAC drivers among adults, particularly the rising rates among women and Hispanics, suggests that current interventions may be insufficient for these groups. The authors note that as a new generation enters adulthood, drinking and driving may become a more significant issue for women.
Key finding
The total number of drinking drivers fell by about one-third between 1986 and 1996, but there was no significant change in the number of drivers with BACs at or above 0.05.
Methodology
naturalistic
Sample size: 6028
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_rosap on 2026-05-23 (6 acquisition events logged).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | rosap | — | — | 2 | 2026-05-23 |
| archive | success | — | — | — | 1 | 2026-05-23 |
| extract | success | cached | — | — | 2 | 2026-06-10 |
| clean | success | — | — | — | 1 | 2026-06-01 |
| chunk | success | — | — | — | 1 | 2026-06-01 |
| embed | success | — | — | — | 1 | 2026-06-02 |
| enrich | success | — | — | — | 1 | 2026-05-23 |
| promote | success | — | — | — | 1 | 2026-05-23 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 3 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 19 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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Information type
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- Empirical Findings: observational prevalence, crash risk outcomes
- Methodological Resource: dataset resource