Black Hole
May contain traces of nut
I agree, abbreviated words should be signalled somehow*. I was going to say the dot was a placeholder for missing letters, which would not be the case in St. (Saint), but that's clearly not the case in Dr. (Doctor). Perhaps that's a convention for titles only?Why not "St." ? I thought that was exactly the abbreviation for Saint or Street. "St" isn't an abbreviation to my mind.
I don't believe anyone who says a decision was made to simplify road signs by omitting apostrophes – I reckon that's finding an explanation after the fact (the fact being lack of education).
* Although I am personally inclined to omit the dot after well-known contractions (such as Mr) or in initialisms (such as RADAR), simply because typewriter/computer letter spacing makes them take up too much space on the line.
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