Samenvatting
For the estimation of fatigue in the drivers the following criteria are used: 1) The decrease of C.F.F.F. (Critical Flicker Fusion Frequency. 2) The change of average value or standard deviation of a physiological or psychological function. 3) The change of relativity among some physiological functions, i.e., antagonism, synchronization, syntonization, etc. 4) The increase of the subjective symptoms.