When you’re driving down the highway, you naturally pay attention to traffic signs. But do you ever think about why they look the way they do or why they’re a certain color? Take the green ones. Green ...

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 ...

Q: Doug Brown of Moreno Valley asked about the large green signs that hang above freeway lanes that indicate the distance to upcoming exits. The new green signs are covered with a clear protective ...