If that was the case, we should contact highway departments worldwide and have them pull down all signs with symbols, and replace them with blocks of text.
If reading a block of text is quicker to understand correctly than a universal warning sign, we could save countless lives around the world.
oops I am sorry.. 'wink'
Interesting, but I could swear that on my drive home tonight that the signs that were trying to give me directional information were these big green rectangles with white text in them. And since apps almost always have interesting information to convey...