Pulling off the exit ramp on a highway in Pennsylvania, I saw a sign that caught my
attention. It was part of a collection of blue informational signs that featured no words,
just icons accompanied by directional arrows. For example, here was a little blue sign
with images of a fork and spoon on it, along with an arrow pointing to the left. Then there
was a sign with a little gas pump icon and another arrow pointing to the left. Next there
was a sign with a picture of a tent and an arrow pointing to the right. And then, finally,
