Abstract
In order to study driver’s mental workload when driving on snow pavement, data of snow pavement’s friction coefficient were observed and blood flow, skin temperature and respiration volume of driver’s were obtained through field experiment. Friction coefficient of snow pavement ranges from 0.04 to 0.31. The correlation between temperature of atmosphere and friction coefficient, snow’s thickness and friction coefficient are weak. And the correlation between moisture of atmosphere and friction coefficient, snow’s degree of compaction and friction coefficient are strong. Multi-linear regression model was established among moisture of atmosphere, snow’s degree of compaction and friction coefficient. The average value of inexperienced driver’s blood flow, skin temperature and respiration volume are 171.423mv, 33.263°C and 2317.263ml when driving on snow pavement, which are far greater than that of experienced driver’s and that of inexperienced driver’s when being immobile and driving on non-snow pavement. The effects of snow pavement on mental workload of inexperienced driver’s are obvious. According to driver’s physiological index, calculation model of diver’s tenseness degree was established and it can evaluate tenseness of drivers quantitatively.
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