Green Road Signs Green road signs are most common on highways and provide directional guidance. They usually contain information about mileage, upcoming exits, and what lane to use if you’re ...

A Holiday Inn every few miles, a McDonald’s fry pit off almost every exit and green road signs with white letters. The uniformity of the 46,876 miles that comprise the Interstate Highway System ...

The new green signs are covered with a clear protective plastic film, like a cell phone screen cover. When Caltrans workers install a new sign, they do not remove the clear protective film.

The typeface you see on those big, green signs is aptly called Highway Gothic. The first research for its use as a freeway sign was in California starting in 1949.

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