Abstract:
OBJECTIVE:This study aimed to investigate the impacts of feature selection on driver cognitive distraction (CD) detection and validation in real-world nonautomated and Level 2 automated driving scenarios. BACKGROUND:Real-time driver state monitoring is critical to promote road user safety. METHOD:Twenty-four participants were recruited to drive a Tesla Model S in manual and Autopilot modes on the highway while engaging in the N-back task. In each driving mode, CD was classified by the random forest algorithm built on three "hand-crafted" glance features (i.e., percent road center [PRC], the standard deviation of gaze pitch, and yaw angles), or through a large number of features that were transformed from the output of a driver monitoring system (DMS) and other sensing systems. RESULTS:In manual driving, the small set of glance features was as effective as the large set of machine-generated features in terms of classification accuracy. Whereas in Level 2 automated driving, both glance and vehicle features were less sensitive to CD. The glance features also revealed that the misclassified driver state was the result of the dynamic fluctuations and individual differences of cognitive loads under CD. CONCLUSION:Glance metrics are critical for the detection and validation of CD in on-road driving. APPLICATIONS:The paper suggests the practical value of human factors domain knowledge in feature selection and ground truth validation for the development of driver monitoring technologies.
journal_name
Hum Factorsjournal_title
Human factorsauthors
Yang S,Wilson KM,Roady T,Kuo J,Lenné MGdoi
10.1177/0018720820964149subject
Has Abstractpub_date
2020-10-15 00:00:00pages
18720820964149eissn
0018-7208issn
1547-8181pub_type
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