DEVELOPMENT OF MEANS FOR COMPARATIVELY EVALUATING STRESS ON VEHICLE DRIVERS CAUSED BY ORAL AND VISUAL INFORMATION TRANSFER

ENTWICKLUNG VON MASSEN ZUR VERGLEICHENDEN BEURTEILUNG DER BEANSPRUCHUNG DES FAHRZEUGFUEHRERS DURCH AUDITIVE UND VISUELLE INFORMATIONSUEBERTRAGUNG

TOO MUCH INFORMATION RELAYED TO DRIVERS CAN BE A CAUSE OF ACCIDENTS WHICH ARE DESCRIBED IN STATISTICS AS CAUSED BY HUMAN ERROR. THE OBJECTS OF THE RESEARCH ARE TO EVALUATE THE STRESS ON DRIVERS CAUSED BY INFORMATION LOADING, AND TO REDUCE THIS LOADING BY SUITABLE OPTICAL OR ACOUSTICAL INFORMATION TRANSFER. THE SIZE OF THE USEFUL FIELD OF VISION DETERMINED BY RATES OF DETECTION OF PERIPHERAL LIGHT SOURCES IS DEVELOPED AS AN INDICATOR OF STRESS, AND COMPARED WITH OTHER METHODS. IN REAL TRAFFIC THE METHOD DISTINGUISHES STAGES OF STRESS LOADING SUCH AS DRIVING BEFORE AND DURING A CROSSING MANOEUVRE. COMPARED WITH OTHER METHODS OF INDICATING STRESS THE METHOD PROVIDES A GOOD INDICATION OF VARYING STAGES OF STRESS. A DISADVANTAGE IS ITS SENSITIVITY TO VARIATION IN OPTICAL BOUNDARY CONDITIONS, WHICH CAN BE CONTROLLED IN THE LABORATORY BUT NOT IN REAL TRAFFIC. FOR A COMPARATIVE STUDY OF OPTICAL AND ACOUSTIC INFORMATION INDICATORS IN THE VEHICLE, EFFICIENCY PARAMETERS ARE BEING USED AS WELL AS THE MEASUREMENT OF STRESS. RECOMMENDATIONS ARE BEING DRAWN UP FOR THE DESIGN IN THE VEHICLE OF BINARY INDICATORS AND INDICATORS WITH TEXTUAL INFORMATION, BASED ON EXPERIMENTAL RESULTS. FOR IMPORTANT BUT RARELY REQUIRED INFORMATION ACOUSTIC INDICATORS OR OPTICAL FLASHING INDICATORS ARE FAVOURED, WHEREAS FOR FREQUENTLY OCCURRING INFORMATION OPTICAL INFORMATION IS MORE SUITABLE. FOR TEXTUAL INFORMATION THE SPOKEN FORM IS LESS DISTRACTING FROM THE TASK OF DRIVING THAN THE WRITTEN FORM AND IS THEREFORE PREFERRED.