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Title: Road safety: The influence of vibration frequency on driver drowsiness, reaction time, and driving performance.
Austin Authors: Zhang, N;Fard, M;Xu, J;Davy, J L;Robinson, S R
Affiliation: School of Engineering, RMIT University, Australia.
School of Engineering, RMIT University, Australia.
School of Science, RMIT University, Australia; Infrastructure Technologies, CSIRO, Australia.
School of Health and Biomedical Sciences. RMIT University, Australia.
Institute for Breathing and Sleep
Issue Date: 7-Oct-2023
Date: 2023
Publication information: Applied Ergonomics 2023-10-07; 114
Abstract: Driver drowsiness is a factor in at least 20% of serious motor vehicle accidents. Although research has shown that Whole-Body Vibration (WBV) can induce drowsiness in drivers, it is unknown whether particular frequencies are more problematic. The present study systematically investigated the influence of WBV frequency on driver drowsiness. Fifteen participants each undertook six 1-h sessions of simulated driving while being subjected to WBV of either 0 Hz (no vibration), 1-4 Hz, 4-8 Hz, 8-16 Hz, 16-32 Hz or 32-64 Hz. Subjective sleepiness, as measured by the Karolinska Sleepiness Scale (KSS), confirmed that drivers felt drowsier when exposed to the two lowest frequency ranges (1-4 Hz and 4-8 Hz). Reaction time, which measures attention and alertness, was significantly impaired by the two lowest frequency ranges. Objective driving performance measures (Standard Deviation of Lane Position (SDLP), Standard Deviation of (SD) Steering Angle, Time in Unsafe Zone) also showed significant degradation due to exposure to the two lowest frequency ranges. Exposure to 1-4 Hz or 4-8 Hz vibration caused attention to become significantly impaired within 15-20 min and driving performance to be significantly impaired by 30-35 min. The other frequency ranges had little or no effect. These findings point to a need to develop equivalent vibration-induced drowsiness contours that can be adopted as transportation safety standards.
DOI: 10.1016/j.apergo.2023.104148
Journal: Applied Ergonomics
Start page: 104148
PubMed URL: 37813019
ISSN: 1872-9126
Type: Journal Article
Subjects: Equivalent drowsiness contours
Motor vehicle design
Steering angle
Whole-body vibration
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