Fast: What does blue road sign mean?

I am not sure? You are not alone. But quickly decoding the signs is important for your safety.

Fortunately, research designers understand this. “A good sign must be understandable at a glance,” says M. Pronin, member of the International Road Signs Comprehension Assessment Project (yes, there is). Given that road signs can include words, symbols, special colors, or any combination of these, they can be confusing. More worryingly, some drivers do not know what some road signs mean, or they may misinterpret them, which can be dangerous.

“Signs with more than 80 percent comprehension are considered very well understood, but testing shows that even the most ‘obvious’ signs rarely reach 100 percent comprehension,” says Pronin.

How well do you know the road signs? Take the quiz to find out.