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Does a Confidence Level for Automated Driving Time Estimations Improve the Subjective Evaluation of an Automation HMI?

Department of Mechanical Engineering, Technical University of Munich, BY 85748 Garching, Germany
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Multimodal Technol. Interact. 2020, 4(3), 36; https://doi.org/10.3390/mti4030036
Received: 4 June 2020 / Revised: 30 June 2020 / Accepted: 1 July 2020 / Published: 3 July 2020
Current research in human factors and automated driving is increasingly focusing on predictable transitions instead of urgent and critical take-overs. Predictive human–machine interface (HMI) elements displaying the remaining time until the next request to intervene were identified as a user need, especially when the user is engaging in non-driving related activities (NDRA). However, these estimations are prone to errors due to changing traffic conditions and updated map-based information. Thus, we investigated a confidence display for Level 3 automated driving time estimations. Based on a preliminary study, a confidence display resembling a mobile phone connectivity symbol was developed. In a mixed-design driving simulator study with 32 participants, we assessed the impact of the confidence display concept (within factor) on usability, frustration, trust and acceptance during city and highway automated driving (between factor). During automated driving sections, participants engaged in a naturalistic visual NDRA to create a realistic scenario. Significant effects were found for the scenario: participants in the city experienced higher levels of frustration. However, the confidence display has no significant impact on the subjective evaluation and most participants preferred the baseline HMI without a confidence symbol. View Full-Text
Keywords: automated driving; human–machine interface; confidence display; usability automated driving; human–machine interface; confidence display; usability
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MDPI and ACS Style

Hecht, T.; Danner, S.; Feierle, A.; Bengler, K. Does a Confidence Level for Automated Driving Time Estimations Improve the Subjective Evaluation of an Automation HMI? Multimodal Technol. Interact. 2020, 4, 36. https://doi.org/10.3390/mti4030036

AMA Style

Hecht T, Danner S, Feierle A, Bengler K. Does a Confidence Level for Automated Driving Time Estimations Improve the Subjective Evaluation of an Automation HMI? Multimodal Technologies and Interaction. 2020; 4(3):36. https://doi.org/10.3390/mti4030036

Chicago/Turabian Style

Hecht, Tobias, Simon Danner, Alexander Feierle, and Klaus Bengler. 2020. "Does a Confidence Level for Automated Driving Time Estimations Improve the Subjective Evaluation of an Automation HMI?" Multimodal Technologies and Interaction 4, no. 3: 36. https://doi.org/10.3390/mti4030036

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