National occupant protection use survey : controlled intersection detailed study
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Summary
This study analyzed shoulder belt use rates among drivers and passengers in passenger cars and light trucks using data from the 1994 National Occupant Protection Use Survey. Researchers observed vehicles at 2,500 controlled intersections and matched license plates to state registration files to determine specific vehicle characteristics such as size, model year, and restraint type. The analysis revealed that belt use was highest in subcompact cars and minivans, while lowest in the largest cars and pickup trucks. Vehicles equipped with automatic restraints or air bags showed significantly higher usage rates compared to those with manual belts only. Additionally, newer model years generally exhibited higher belt use, particularly following the mandate for automatic restraints in 1990. The findings suggest that vehicle design features and age strongly influence occupant protection behavior.
Key finding
Shoulder belt use was highest in vehicles with automatic restraints or air bags and in minivans, while lowest in the largest cars, pickup trucks, and vehicles with manual belts.
Methodology
field_study
Sample size: 72672
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 (7 acquisition events logged).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | rosap | — | — | 2 | 2026-05-23 |
| archive | success | — | — | — | 1 | 2026-05-23 |
| extract | skipped | empty | — | — | 4 | 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 | — | 3 | 2026-06-01 |
| tag | success | vector_similarity | — | — | 24 | 2026-06-11 |
| verify | success | — | — | — | 1 | 2026-06-03 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-01; verification: verified.
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Information type
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- Empirical Findings: observational prevalence