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

Table 1

Grades of Cohen’s to evaluate effect.

Cohen’s	Grades of effect	The significance of effect grade
	Light effect	Light influence on the driver’s visual psychology.
	Medium effect	Medium influence on the driver’s visual psychology.
	Strong effect	Strong influence on the driver’s visual psychology.