Conspicuity Research on the Highway Roadside Objects: A Simulator Study

Table 7

The legibility assessment scores of the objects under 120 km/h.

Contours	Sizes of the roadside objects (m^2)
	1	16	49	100	169
Triangle	0.48	2.03	2.98	5.24	7.00
Rectangle	0.44	2.00	2.95	4.78	6.91
Round	0.42	1.90	2.83	4.20	6.70

∗1: not at all legible. 7: extremely legible.