Lane keeping performances subjected to whole-body vibrations
DOI: 10.14419/ijet.v7i4.13.21318
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Summary
This study investigates the impact of whole-body vibration (WBV) on driver drowsiness and lane-keeping performance, addressing a gap in scientific knowledge regarding vibration-induced sleepiness. While WBV is known to affect comfort, its specific role in promoting drowsiness and impairing driving safety remains underexplored, with no established standards for "drowsiness contours" akin to existing comfort standards. The research aims to quantify these effects using both objective driving metrics and subjective sleepiness ratings. The experiment involved 20 male university students (mean age 23.0 years) screened for normal sleep quality and no history of low back pain. Participants underwent a randomized cross-over design with two conditions: a baseline no-vibration condition and a with-vibration condition. In the vibration condition, subjects were exposed to Gaussian random vibration (1–15 Hz bandwidth, 0.2 m/s² r.m.s.) for 30 minutes while seated in a car seat mounted on a hydraulic actuator. Objective performance was measured using a driving simulator, recording the standard deviation of lateral position (SDLP) during 10-minute driving sessions before and after the exposure period. Subjective drowsiness was assessed using the Karolinska Sleepiness Scale (KSS) at five-minute intervals. Results indicated that WBV significantly impaired driving performance and increased drowsiness. After 30 minutes of vibration exposure, SDLP increased significantly (P < 0.05), rising from a mean of 23.6 cm to 26.2 cm, representing an 11% increase in lane variability. This deviation is comparable to the impairment observed in drivers with a blood alcohol concentration of 0.05%. Subjectively, KSS scores rose substantially in the vibration condition compared to the baseline. While initial alertness levels were similar, vibration exposure accelerated the onset of drowsiness; after 15 minutes, the mean KSS score was 6.11 in the vibration condition versus 4.84 in the no-vibration condition. By the end of the exposure, the vibration group reported significantly higher sleepiness (mean KSS 7.26 vs. 5.16; P < 0.05). The study concludes that even low-level whole-body vibration significantly reduces alertness and degrades psychomotor performance, specifically lane-keeping ability. These findings suggest that vehicle seat vibrations are a critical, yet overlooked, factor in driver drowsiness. The authors recommend that automotive industry guidelines and international standards, such as ISO 2631-1, be extended to include thresholds for drowsiness-inducing vibration to enhance road safety.
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | Crossref | — | — | 1 | 2026-06-20 |
| archive | success | canonical_url | — | — | 1 | 2026-06-26 |
| extract | success | cached | — | — | 2 | 2026-06-26 |
| clean | success | clean | — | — | 1 | 2026-06-25 |
| chunk | success | chunk | — | — | 1 | 2026-06-25 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-25 |
| promote | success | — | — | — | 1 | 2026-06-20 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 1 | 2026-06-26 |
| tag | success | vector_similarity | — | — | 6 | 2026-06-25 |
| verify | success | — | — | — | 1 | 2026-06-26 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.
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- Empirical Findings: physiological data