Application of CNN-LSTM Model for Vehicle Acceleration Prediction Using Car-following Behavior Data

Table 1

Segmentation of variables.

Variable	Variable state	Threshold
Relative distance (m)	Close distance (CD)	(5, 26.34]
	Normal distance (ND)	(26.34, 57.76]
	Long distance (LD)	>57.76
Relative speed (m/s)	Rapidly falling behind (RFB)	>1.0
	Falling behind (FB)	(0.2, 1.0]
	Keeping (KE)	(−0.2, 0.2]
	Closing in (CI)	(−1.3, −0.2]
	Rapidly closing in (RCI)	≤−1.3
Acceleration (m/s^2)	Aggressive deceleration (AD)	≤−0.22
	Gentle deceleration (GD)	(−0.22, −0.07]
	No acceleration (NA)	(−0.07, 0.05]
	Gentle acceleration (GA)	(0.05, 0.19]
	Aggressive acceleration (AA)	>0.19