Table 2.

Driving performance under different driving states

Driving performance	N	C	V	P (C vs. N)	P (V vs. N)	P (C vs. V)
Speed (m/s)	16.35 ± 0.73	15.82 ± 0.69	16.12 ± 0.69	0.00	0.78	0.57
Acceleration (m/s2)	−0.19 ± 0.25	0.03 ± 0.37	0.05 ± 0.39	0.00	0.00	1.00
Centerline offset std (m)	0.22 ± 0.10	0.22 ± 0.09	0.28 ± 0.12	1.00	0.001	0.004
Steering angle std (°)	0.029 ± 0.02	0.024 ± 0.01	0.030 ± 0.02	0.69	0.11	0.01

Bold text represents significant results (P < 0.05). N, normal driving; C, cognitive distraction; V, visual distraction; std, standard deviation.