National Occupant Protection Use Survey: Shopping Center Study
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Summary
This research note presents findings from the Shopping Center Study, a component of the 1994 National Occupant Protection Use Survey (NOPUS) conducted by the National Highway Traffic Safety Administration. The study was motivated by the need to gather specific data on rear-seat belt use, shoulder belt misuse, and lap belt usage, areas where information was previously scarce. Unlike other NOPUS studies that utilized statistically selected sites in moving traffic or at controlled intersections, this study collected data at shopping centers. While the results are unweighted and not representative of national belt use, they provide valuable insights into specific occupant behaviors. Data collection involved observers stationed at 140 shopping centers across 50 geographic sites. Each site was selected for having separate entrance and exit lanes, preferably with curbs. Observers recorded data for one hour per location between 10 a.m. and 6 p.m. on both weekdays and weekends. The study focused exclusively on automobiles, recording the make, model, and license plate of each vehicle. Observers monitored the driver, the right-front-seat passenger, and rear-seat outboard passengers. Misuse was defined as wearing the belt under the arm, behind the back, or too loose, specifically defined as having at least a fist width of slack. Children in safety seats were counted as belted, while those not in seats were categorized like other occupants. The study observed 5,500 drivers, 2,000 front-seat passengers, and 700 rear-seat passengers. Overall safety belt use was observed in 61% of drivers, 56% of front-seat passengers, and 38% of rear-seat outboard passengers. When breaking down belt types, 58% of drivers used both lap and shoulder belts, compared to 55% of front-seat passengers and 32% of rear-seat passengers. Shoulder belt misuse was recorded at 8% for drivers and front-seat passengers, and 10% for rear-seat passengers. The most common form of misuse for all groups was having the shoulder belt too loose (4% for each group), followed by wearing it behind the back (3% for drivers and front passengers, 4% for rear passengers) and under the arm (1% for drivers and front passengers, 2% for rear passengers). Consequently, 32% of drivers, 36% of front-seat passengers, and 52% of rear-seat passengers were neither using nor misusing belts. The findings indicate that shopping center results closely mirror those from the statistically weighted controlled intersection studies, particularly regarding shoulder belt use rates. For instance, driver shoulder belt use was 60% in the shopping center study versus 63% in the intersection study. The data highlights a significant disparity in belt usage between front and rear seats, with rear-seat outboard passengers showing the lowest usage rates and highest proportion of unbelted occupants. This study successfully provided critical data on rear-seat behavior and specific misuse patterns, filling gaps in existing traffic safety knowledge.
Key finding
Only 38 percent of rear-seat outboard passengers were observed belted, versus 56 percent of front-seat passengers and 61 percent of drivers.
Methodology
field_study
Provenance
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| 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 |
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| 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 | — | — | 24 | 2026-06-11 |
| verify | success | — | — | — | 3 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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- Empirical Findings: observational prevalence