AbstractAutomobile driving in monotonous situations such as driving for long periods and/or travelling a familiar route may cause the lowering of the driver’s awareness level or what we term here as a Driver’s Activation State (DAS), resulting in an increased risk of an accident. We propose here to develop means with which to create an in-car environment so as to allow active driving, hopefully thus avoiding potentially dangerous situations. In order ultimately to develop a validated activation method, we firstly set out to examine physiological variables, including cardiovascular parameters, during simulated monotonous driving. Subsequently, we investigated the derivation of a suitable DAS index. During the experiment, a momentary electrical test stimulus of 0.5s duration was applied at a rate of approximately once per 10min to the subject’s shoulder to evoke a physiological responses. In 11 healthy male volunteers we successfully monitored physiological variables during the experiment and found particular patterns in the beat-by-beat changes of blood pressure in response to the electrical test stimulus. This finding, explained by autonomic activity balance, suggests that the patterns may be used as an appropriate and practicable index relevant to the Driver’s Activation State.
A novel physiological index for Driver’s Activation State derived from simulated monotonous driving studies
Tramsportation Research, Part C: Emerging Technologies ; 17 , 1 ; 69-80
2008-09-17
12 pages
Article (Journal)
Electronic Resource
English
BCR , baroreceptor cardiac reflex , BP , blood pressure , SBP , systolic blood pressure , MBP , mean blood pressure , DBP , diastolic blood pressure , BPRP-ETS , blood pressure response pattern following the electrical test stimulus , BRS , baroreceptor reflex sensitivity , DAS , driver’s activation state , DASI , index of the driver’s activation state , ECG , electro-cardiogram , EEG , electro-encephalogram , EOG , electro-oculogram , ETS , electrical test stimulus , FPG , finger photo-plethysmograph , MEM , maximum entropy method , NPV , normalized pulse volume , OJL , objective judgment level , Automotive safety , Autonomic regulation , Beat-by-beat blood pressure , Cardiovascular monitoring , Driver’s Activation State , Monotonous driving
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