Table 3: Performance of each model by driving conditions.

Group	Condition	Regression analysis	SVM	Deep learning
1	Acc. ≥ 0	0.951	0.971	0.972
2	Acc. < 0 and slip ≥ 0	0.955	0.962	0.924
3	Acc. < 0 and slip < 0	0.927	0.961	0.956
Average		0.944	0.965	0.951