Print Email Facebook Twitter Automated driving reduces perceived workload, but monitoring causes higher cognitive load than manual driving Title Automated driving reduces perceived workload, but monitoring causes higher cognitive load than manual driving Author Stapel, J.C.J. (TU Delft Intelligent Vehicles) Mullakkal-Babu, F.A. (TU Delft Transport and Planning) Happee, R. (TU Delft Intelligent Vehicles) Date 2019 Abstract Driver mental workload is an important factor in the operational safety of automated driving. In this study, workload was evaluated subjectively (NASA R-TLX) and objectively (auditory detection-response task) on Dutch public highways (∼150 km) comparing manual and supervised automated driving in a Tesla Model S with moderators automation experience and traffic complexity. Participants (N = 16) were either automation-inexperienced drivers or automation-experienced Tesla owners. Complexity ranged from an engaging environment with a road geometry stimulating continuous traffic interaction, and a monotonic environment with lower traffic density and a simple road geometry. Perceived and objective workload increased with traffic complexity. When using the automation, automation-experienced drivers perceived a lower workload, while automation-inexperienced drivers perceived their workload to be similar to manual driving. However, the detection-response task indicated an increase in cognitive load with automation, in particular in complex traffic. This indicates that drivers under-estimate the actual task load of attentive monitoring. The findings also highlight the relevance of using system-experienced participants and the importance of incorporating both objective and subjective measures when examining workload. Subject AttentionAutomated drivingExperienceOn-roadWorkload To reference this document use: http://resolver.tudelft.nl/uuid:91a2c525-4def-4014-8d76-e4262291c04c DOI https://doi.org/10.1016/j.trf.2018.11.006 Embargo date 2019-06-11 ISSN 1369-8478 Source Transportation Research. Part F: Traffic Psychology and Behaviour, 60, 590-605 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2019 J.C.J. Stapel, F.A. Mullakkal-Babu, R. Happee Files PDF 1_s2.0_S1369847818301335_main.pdf 1.87 MB Close viewer /islandora/object/uuid:91a2c525-4def-4014-8d76-e4262291c04c/datastream/OBJ/view