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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