A Monday, Jan. 26, crash that brought down a highway sign on state Route 18 has caused the on-ramp to Interstate 77 to close.

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: There’s a new sign on the eastbound I-10 Freeway near the Main Street exit in Cabazon. Rest stops and the miles to them are listed, but what do the numbers on the lighted portion of the sign mean?