A Sensor-Based Visual Effect Evaluation of Chevron Alignment Signs’ Colors on Drivers through the Curves in Snow and Ice Environment

Table 2

Fixation duration and pupil size in each scenario.

Curve environment	Chevrons tests (T1–T4)	Fixation duration (second)		Pupil size (pixel)
		AVG	SD	AVG	SD
CS	Without Chevrons	0.543	0.457	31.196	1.001
	Red Chevrons	0.558	0.390	31.303	1.547
	Green Chevrons	0.277	0.241	33.452	2.382
	Blue Chevrons	0.334	0.256	30.285	1.398
SICS	Without Chevrons	0.352	0.199	36.736	2.196
	Red Chevrons	0.427	0.246	34.055	1.347
	Green Chevrons	0.348	0.273	34.355	2.500
	Blue Chevrons	0.345	0.215	37.179	1.948