TABLE 1.

Descriptive statistics of behavioral metrics of simulated driving performance: turn speed, time to turn and number of collisions in the turning tasks (R, L, LT, and LTA), driving speed and lane position in straight driving tasks (S, SA), and response time and response accuracy in audio tasks (SA, LTA).

Condition	Turn speed				Time to turn				Collisions
	Mean (km/hr)	SD (km/hr)	95% CI		Mean (s)	SD (s)	95% CI		total count
			LB	UB			LB	UB
R	30.5	5.9	26.8	34.3	10.4	1.3	9.6	11.3	2
L	37.9	4.8	34.9	40.9	10.2	1.2	9.4	11.0	1
LT	35.6	3.4	33.4	37.7	9.9	2.5	8.3	11.5	2
LTA	34.3	3.0	32.4	36.3	10.5	1.7	9.4	11.6	2
	Driving speed						Lane position
		Mean (km/hr)		SD (km/hr)	95% CI		Mean (m)	SD (m)	95% CI
					LB	UB			LB	UB
S		62.5		2.0	61.2	63.8	2.2	0.4	1.9	2.5
SA		60.4		0.8	59.9	60.9	2.3	0.3	2.1	2.5
	Response time						Response accuracy
		Mean (s)		SD (s)	95% CI		Mean (%)	SD (%)	95% CI
					LB	UB			LB	UB
SA		4.1		0.7	3.6	4.6	83.3	20.1	70.6	96.1
LTA		4.1		1.3	3.3	5.0	77.4	14.2	68.3	86.4

SD, standard deviation; CI, Confidence Interval; LB, Lower Bound; UB, Upper Bound. R, right turns; L, left turns; LT, left turns with oncoming traffic; LTA, left turns with oncoming traffic and auditory distraction; S, straight driving; SA, straight driving with auditory distraction.