Driver Control and Psychological Load Characteristics for Typical Risk Scenarios
Objective In order to reveal the driver's manipulation and psychological characteristics under typical risk scenarios.Methods Select 40 drivers to conduct self-selected driving experiments using on-board driving re-corders,psychological guidance instruments,etc.Two typical risk scenarios(lane transition zone,front car braking)were selected through experiments,and multi-source parameters such as vehicle running status and driver's psycho-logical load under two typical risk scenarios were collected in real time.The indexes of early deceleration time,mini-mum TTC,heart rate growth rate(HRI),root mean square of R-R interval difference(RMSSD),low frequency/high frequency ratio(LF/HF)were introduced to analyze the driver's manipulation and psychological characteristics.Re-sults The results show that in the lane transition zone,the skilled driver starts to slow down 0.5～1.5 s in advance,and the unskilled driver only partially starts to slow down 0～1.5 s in advance.With the advance of the deceleration time,RMSSD showed an upward trend and LF/HF decreased significantly,indicating that the driver's mental load gradually decreased.In the front vehicle braking scenario,the minimum TTC of skilled drivers is concentrated in 4.8～5.3 s,while that of unskilled drivers is mainly distributed in 4.5～5.9 s.With the increase of minimum TTC,HRI and LF/HF gradually decreased,while RMSSD had a significant upward trend,indicating that the driver's degree of tension gradually weakened.Conclusion The research results can provide important reference for safety education and training of drivers in typical risk situations.
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