Crossing sign

A pedestrian crossing sign

A pedestrian crossing sign was a sign that told those wishing to cross the street when it was safe to cross and when it was not, using the terms "WALK" and "DON'T WALK".

In 1986, the city of San Francisco used these signs. James T. Kirk and Spock stood near a pair while time traveling back to that year. (Star Trek IV: The Voyage Home)

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