Experimental Study for Influences of Digital Assistant Device Use on Driving Behavior


The voice-input interfaces of digital assistant devices are expected to reduce influences on the driving behaviors than visual-manual interfaces, though impacts of voice-input tasks are not sufficiently clear. This study examined the influences of the digital devices use during driving on the vehicle position variability through comparing the vehicle lateral displacement and headway distance. As the results of a driving experiment on a proving ground, following properties were clarified; (1) variability of vehicle position increased as a function of manual steps and voice inputs of digital device tasks, (2) small size of visual display deteriorated the visual behavior and subjective ratings, (3) digital device tasks impaired the driving behaviors if the tasks required longer total glance time exceeding 8 seconds. It was also revealed the voice-input task increased the variability of headway distance, in contrast to the visual-manual tasks harmed variability of both lateral displacement and headway distance. This result suggests the voice-inputs operation can reduce drivers' processing resources and it deteriorates coping behaviors to the relatively less conspicuous on-road events.スマートフォンなど情報機器タスクの運転行動への影響を,追従走行状況で調べた.視認手操作は車間距離と横位置の変動性をともに増すのに対し,音声操作は車間距離変動性を増すが,車両横位置変動性への影響は小さかった.音声操作HMI は,認知的負荷がドライバの情報処理資源を減ずることにより影響を生じるとみられる.


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  • Accession Number: 01667857
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Jan 31 2018 3:17PM