Driver fatigue remains a critical concern in the realm of traffic safety. In particular, passive driver fatigue, promoted by prolonged exposure to low-workload driving and boredom, not only poses threats to daily driving but also may compromise the effectiveness of takeover in future autonomous driving. Commonly adopted strategies involve activities that drivers can engage in to awaken their bodies and minds, or in-vehicle interactive systems implemented by manufacturers to alleviate boredom. However, there is currently limited focus given to user-accessible in-vehicle physical activities aimed at addressing passive fatigue. Therefore, this study proposed manual dexterity gymnastics as finger exercises that are conveniently implemented against passive driver fatigue. The finger exercises consisted of tapping the fingertip, pressing nail roots, flicking fingers, pressing the sides of fingertips, and closing and opening the fingers. To evaluate this countermeasure, eighteen participants performed a monotonous driving task using a driving simulator. The driving sessions each lasted 90 min. Each participant drove in two sessions consisting of either manual dexterity gymnastics or watching videos. Passive driver fatigue was assessed by physiological indexes, driving performance analysis, vigilance assessment, and subjective evaluation. The manual dexterity gymnastics significantly suppressed driver fatigue according to the percentage of eyelid closure, blink frequency, and steering reversal rate. Furthermore, vigilance was also improved, and the subjective evaluation showed that fatigue was significantly lower. The experimental results suggested that manual dexterity gymnastics may be regarded as an effective countermeasure to suppress the deterioration of passive driver fatigue.

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用户可访问的对策的评估：手动灵巧体操对被动驾驶员疲劳的影响

驾驶员疲劳仍然是交通安全领域的一个关键问题。特别是，长时间低工作负荷驾驶和无聊所引发的被动驾驶疲劳，不仅对日常驾驶构成威胁，还可能损害未来自动驾驶的接管有效性。通常采用的策略包括驾驶员可以参与的活动来唤醒他们的身心，或者制造商实施的车载交互系统来缓解无聊。然而，目前对旨在解决被动疲劳的用户可进行的车内身体活动的关注有限。因此，本研究提出手动灵巧体操作为手指练习，可以方便地针对被动驾驶疲劳进行。手指练习包括敲击指尖、按压指甲根部、弹指、按压指尖侧面、闭合和张开手指等。为了评估这一对策，十八名参与者使用驾驶模拟器执行了一项单调的驾驶任务。每次驾驶课程持续 90 分钟。每位参与者都参加两节课，包括手动灵巧体操或观看视频。通过生理指标、驾驶性能分析、警觉性评估和主观评价来评估被动驾驶疲劳。根据眼睑闭合百分比、眨眼频率和转向反转率，手灵巧体操显着抑制了驾驶员疲劳。此外，警惕性也得到了提高，主观评价显示疲劳感明显降低。实验结果表明，手动灵巧操可作为抑制被动驾驶疲劳恶化的有效对策。