%0 Journal Article
%T Automated driving reduces perceived workload, but monitoring causes higher cognitive load than manual driving
%J Transportation research part F: traffic psychology and behaviour
%D 2019
%A Stapel, Jork
%A Mullakkal-Babu, Freddy Antony
%A Happee, Riender
%V 60
%N 
%P 590-605
%X 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.<p /> <p>Language: en</p>
%G en
%I Elsevier Publishing
%@ 1369-8478
%U http://dx.doi.org/10.1016/j.trf.2018.11.006