Mind the Road: Attention related Neuromarkers during Automated and Manual Simulated Driving Captured with a New Mobile EEG Sensor System

Joanna Elizabeth Mary Scanlon ¹ Daniel Küppers ¹ Anneke Büürma ² Axel Heinrich Winneke ^1*

• ¹ Fraunhofer Institute for Digital Media Technology IDMT, Branch Hearing, Speech and Audio Technology, Oldenburg, Germany
• ² Institute of Cognitive Science, Osnabrück University, Osnabrück, Lower Saxony, Germany

Background: Decline in vigilance due to fatigue is a common concern in traffic safety.Partially automated driving (PAD) systems can aid driving but decrease the driver's vigilance over time, due to reduced task engagement. Mobile EEG solutions can obtain neural information while operating a vehicle. The purpose of this study was to investigate how the behaviour and brain activity associated with vigilance (i.e. alpha, beta and theta power) differs between PAD and manual driving, as well as changes over time, and how these effects can be detected using two different EEG systems. Methods: 28 Participants performed two 1-hour simulated driving tasks, while wearing both a standard 24 channel EEG cap and a newly developed, unobtrusive and easy to apply teneight channel mobile EEG sensor-grid system.One scenario required manual control of the vehicle (manual) while the other required only monitoring the vehicle (PAD). Additionally, lane deviation, percentage eye-closure (PERCLOS) and subjective ratings of workload, fatigue and stress were obtained. Results: Alpha, beta and theta power of the EEG as well as PERCLOS were higher in the PAD condition and increased over time in both conditions. The same spectral EEG effects were evident in both EEG systems. Lane deviation as an index of driving performance in the manual driving condition increased over time. Conclusion: These effects indicate significant increases in fatigue and vigilance decrementdecreases over time while driving, and overall higherlower levels of fatigue and vigilance decrement associated with PAD. The EEG measures revealed significant effects earlier than the behavioural measures, demonstrating that EEG might allow faster detection of decreased vigilance than behavioural driving measures. This new, mobile EEG-grid system could be used to evaluate and improve driver monitoring systems in the field or even be used in the future as additional sensor to inform drivers of critical changes in their level of vigilance. In addition to driving, further areas of application for this EEG-sensor grid are safety critical work environments where vigilance monitoring is pivotal.