Green highway signs, also called guide signs, are everywhere, and we pass them by without much thought. But their design has ...

Q: Honk: Why does Caltrans leave that plastic film on its green highway signs that dissolves over time and comes off in pieces — and just looks lousy? Why not just take it off before putting a new ...

If you ever wondered why the signs that you see on the highway, particularly green, here are some safety-based reasons you ...