Identification of Driver Distraction Based on SHRP2 Naturalistic Driving Study

Table 2

Ranking table of important feature indicators.

Importance ranking	Characteristic	Signal	Importance ranking	Characteristic	Signal
1	Mean of velocity	V_mean	12	Residuals sum of squares of velocity	V_ess
2	Mean of desired reaction time	DRT_mean	13	Mean of longitudinal acceleration	Accel_x_mean
3	Mean of headway distance	HWD_mean	14	Regression of slope of desired reaction time	DRT_sr
4	Maximum of relative velocity	Rel_V_mean	15	Standard deviation of longitudinal acceleration	Accel_x_std
5	Standard deviation of steering wheel rate	SWR_std	16	Regression of slope of relative velocity	Rel_V_sr
6	Regression of slope of lateral acceleration	Accel_y_sr	17	Mean of steering wheel rate	SWR_mean
7	Regression of slope of velocity	V_sr	18	Mean of lateral acceleration	Accel_y_mean
8	Steering rate entropy	SRE	19	Regression of slope of longitudinal acceleration	Accel_x_sr
9	Standard deviation of headway distance	HWD_std	20	Residuals sum of squares of steering wheel rate	SWR_ess
10	Residuals sum of squares of headway distance	HWD_ess	21	Residuals sum of squares of relative velocity	Rel_V_ess
11	Maximum of lateral acceleration	Accl_y_max	—	—	—