The Japanese Journal of Ergonomics
Online ISSN : 1884-2844
Print ISSN : 0549-4974
ISSN-L : 0549-4974
Volume 55, Issue 1
Displaying 1-2 of 2 articles from this issue
Research issues
Research paper
  • Akira OHTANI, Azusa KURIYAMA, Tasuku ITO, Yoshinori EGAMI, Keisuke ISH ...
    2019 Volume 55 Issue 1 Pages 5-14
    Published: February 15, 2019
    Released on J-STAGE: August 21, 2020
    JOURNAL FREE ACCESS

    This study investigated the effects of drivers' knowledge of a conditionally automated driving system on their performances in take-over requests from the system while conducting a non-driving-related task. A driving simulator experiment was conducted to answer this research question. Thirty drivers participated in the experiment, fifteen of whom had previously experienced take-over situations in the system ; the others had not experienced and were also instructed in a different way. Participants were asked to regain manual control and avoid colliding with a stopped vehicle when the take-over request occurred while conducting the non-driving-related task. In the take-over request situation, participants were able to know the situation only through visual and auditory displays in the vehicle because they could not perceive it from the frontal scene and vehicle movement. The results showed that participants' knowledge positively affected their performance in the take-over request situation and participants who had knowledge experienced less collisions than participants without knowledge. The results also showed that participants without knowledge tended to execute the non-driving-related task again although they had to react to the changes of traffic situation. Human factor issues in the conditionally automated driving system are discussed in terms of drivers' performances.

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