Letters on some highway signs

This crossword clue is for the definition: Letters on some highway signs.
it’s A 29 letters crossword puzzle definition.
Next time, when searching for online help with your puzzle, try using the search term “Letters on some highway signs crossword” or “Letters on some highway signs crossword clue”. The possible answerss for Letters on some highway signs are listed below.

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Possible Answers: MPH.

Last seen on: Wall Street Journal Crossword – November 30 2022 – Vowel Play