| 초록 |
Based on the recent progress on research and development on automated vehicles, mass production of partially autonomous driving vehicles is expected to be available in the 2020s. According to the SAE standard level 3, a takeover situation may occur where the vehicle driving party changes if autonomous driving is released for unavoidable reasons resulting from vehicle or system limitations. In the case of level 3 vehicles, drivers are not obliged to monitor the situation ahead, but they will be held responsible for any accident. Therefore, it is necessary to investigate how drivers can take over vehicle control swiftly and safely in an unexpected situation. This study compared the auditory alarm(e.g., earcons, spearcons, word-based speech, and sentence-based speech) and the haptic alarm(varied in vibration intensity and period), respectively. The selected dependent variables are user behaviors, biomarkers, and vehicle indices. A total of 26 subjects participated in the human-in-the-loop experiment in a vehicle simulation environment. Based on the analysis results, earcon was found to be the most efficient takeover alarm among the auditory alarms, while high intensity(2 g) combined with long-term alarm(3 s on, 0.2 s off) was found to be the most efficient takeover alarm for the haptic alarm. |
