
Photo:
New York Transit Museum
This great vintage advertisement teaching subway etiquette is found in an old train at the New York Transit Museum. It was part of a series of similar signs under the name "The Subway Sun", each with similar tone and art. Alas, this problem still exists today, so don't be the guy/gal who blocks the door, or else you may get a purse to the head.

Photo:
street moments
via reddit
New York Transit Museum
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