Evaluation of experimental rumble strip areas in Louisiana : interim report No. 1.
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Summary
This interim report evaluates nineteen experimental rumble strip areas installed on rural roads in Louisiana to serve as economical supplements to standard traffic control devices at hazardous intersections. The study aimed to determine if coarse-textured, exposed aggregate strips could provide audible and tactile stimuli to alert drivers and reduce accident frequency or severity. Researchers assessed installation techniques, durability, aggregate loss, and initial driver reactions across various sites. Findings indicated that while post-installation accident statistics were not yet available, drivers responded to the strips by altering their behavior, such as swerving to avoid them, and aggregate loss was negligible after two years. The report concludes that these strips offer a viable, nondestructive deterrent for increasing driver awareness where conventional signage has proven ineffective.
Key finding
Experimental rumble strip areas provided effective audible and tactile stimuli that alerted drivers to hazardous intersections with negligible aggregate loss over two years, though definitive accident reduction data was pending.
Methodology
field_study
Sample size: 19
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 | — | — | 19 | 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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