Home neighborhood, Driving Exposure and Safety among Older Adults: a Mediation Analysis from the LongROAD Study
DOI: 10.32866/001c.126669
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Summary
This study investigates how home neighborhood environments influence driving exposure and safety behaviors among older adults, addressing a gap in knowledge regarding naturalistic driving data. While driving is essential for older adults' independence, age-related declines increase crash risks. The research aims to quantify whether urban, suburban, and rural living contexts affect safety outcomes and to determine if these differences are mediated by specific driving exposures, such as nighttime travel or high-speed road usage. The analysis utilized two years of GPS-tracked driving data from 1,200 drivers aged 65–79 in the Longitudinal Research on Aging Drivers (LongROAD) study, conducted in San Diego, CA, and Cooperstown, NY. Researchers linked participant home addresses to census block group-level built environment metrics from the National Environmental Database and Smart Location Database. Safety outcomes included very high-speed driving events (>80 mph), rapid decelerations (≥0.35 g), and right-to-left turn ratios. Using Ordinary Least Squares regression and Structural Equation Modeling (SEM), the authors assessed associations between urbanicity and safety behaviors, controlling for sociodemographic and health covariates. Results indicated that older adults in urban neighborhoods exhibited significantly higher frequencies of unsafe driving behaviors compared to rural counterparts, including 2.75 times more very high-speed driving events and 1.72 times more rapid decelerations. Suburban drivers showed intermediate levels. These safety differences were partially mediated by driving exposure: urban drivers traveled more frequently on high-speed roads (35.1% mediation for high-speed driving) and during nighttime (5.7% mediation). Additionally, urban trips were shorter in distance and duration. Specific built environment factors further explained these patterns; higher auto-oriented road density and density of nighttime destinations (retail/entertainment) near home were positively associated with unsafe behaviors. Conversely, daytime destination density was linked only to higher right-to-left turn ratios, suggesting caution rather than unsafe behavior. The findings demonstrate that neighborhood design significantly impacts older adult driving safety through altered exposure patterns. Urban environments, characterized by high-speed road networks and nighttime activity centers, correlate with increased risky driving behaviors. The study implies that interventions should target both individual behavior, such as reducing driving in challenging conditions, and urban planning, such as implementing lower speed limits in areas frequented by older drivers. These results provide empirical evidence for designing aging-friendly neighborhoods that mitigate driving risks.
Key finding
Older adults living in urban neighborhoods exhibit more frequent unsafe driving behaviors, which are partially explained by higher exposure to challenging driving conditions such as high-speed roads and nighttime travel.
Methodology
naturalistic
Sample size: 1200
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 author_sweep_intake on 2026-05-28.
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | author_sweep | — | — | 2 | 2026-05-28 |
| archive | success | canonical_url | — | — | 1 | 2026-06-04 |
| extract | success | cached | — | — | 3 | 2026-06-10 |
| clean | success | clean | — | — | 1 | 2026-06-04 |
| chunk | success | chunk | — | — | 1 | 2026-06-04 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-04 |
| enrich | success | — | — | — | 1 | 2026-05-28 |
| promote | success | — | — | — | 1 | 2026-06-04 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 2 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 15 | 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