Conference Proceeding

Assessing Drivers’ Vigilance State During Monotonous Driving

  • Eike A Schmidt (DaimlerChrysler AG, Germany)
  • Wilhelm E Kincses (DaimlerChrysler AG, Germany)
  • Michael Scharuf (DaimlerChrysler AG, Germany)
  • Stefan Haufe (Technische Universität Berlin, Berlin)
  • Ruth Schubert (Charité University, Berlin)
  • Gabriel Curio (Charité University, Berlin)


The differential effects of three hours of monotonous daytime driving on subjective (sleepiness, inattention, monotony), performance (choice reaction time), and physiological (EEG alpha power, P300-amplitude, heart rate) vigilance measures were examined. A linear degradation of drivers’ subjective state, mean long reaction times (as opposed to short ones), P300-amplitude and parietal alpha power with time spent on the highway was identified. An improvement of the subjective measures towards the end of the driving task was not accompanied by any improvement in performance or physiological measures. This dissociation of self-assessment and objective vigilance measures has important implications for the design of modern driver assistant systems that aim to adapt to the driver’s state.

How to Cite:

Schmidt, E. & Kincses, W. & Scharuf, M. & Haufe, S. & Schubert, R. & Curio, G., (2007) “Assessing Drivers’ Vigilance State During Monotonous Driving”, Driving Assessment Conference 4(2007), 138-145. doi:

Rights: Copyright © 2007 the author(s)

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Published on
10 Jul 2007
Peer Reviewed