Green highway signs, also called guide signs, are everywhere, and we pass them by without much thought. But their design has a big role in getting us where we need to go safely. Why are highway signs ...
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?
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