Where does this come from, and can I check it?

Retroreflective green plates became the federal guidance for intersections. The figure is taken from Federal Highway Administration, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a everyday life fact?

Yes. It sits on the Everyday Life shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

American street name signs are usually green

Retroreflective green plates became the federal guidance for intersections The US manual on traffic control devices sets green as the standard background for street name signs, with white lettering that meets minimum reflectivity so drivers can read them at night. Earlier signs were often plain enamel or wood, and older neighbourhoods still carry blue, brown or black plates. Letter height and mounting height are specified too, since low signs are a hazard. It sits in Mondo's everyday life collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Federal Highway Administration

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Tags: signage, streets, standards

American street name signs are usually green: the short answers

Where does this come from, and can I check it?: Retroreflective green plates became the federal guidance for intersections. The figure is taken from Federal Highway Administration, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a everyday life fact?: Yes. It sits on the Everyday Life shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.