Finite Mixture of the Hidden Markov Model for Driving Style Analysis

Table 1

Variable segmentation of feature variables.

Variable	Variable state	Threshold
Relative range (m)	Long distance (LD)	>59.33
	Normal distance (ND)	(27.04, 59.33]
	Close distance (CD)	(5, 27.04]
Relative range rate (m/s)	Rapidly closing in (RCI)	<−1.3
	Closing in (CI)	[−1.3, −0.2)
	Keeping (KE)	[−0.2, 0.2)
	Falling behind (FB)	[0.2, 1.0]
	Rapidly falling behind (RFB)	>1.0
Acceleration (m/s^2)	Aggressive acceleration (AA)	>0.19
	Gentle acceleration (GA)	(0.0522, 0.19]
	No acceleration (NA)	(−0.0642, 0.0522]
	Gentle deceleration (GD)	[−0.2, −0.0642]
	Aggressive deceleration (AD)	<−0.2