<p>Blue Xs on the platform at 51 St on the 6 line encourage subway customers to follow social distancing guidelines on Wed., May 13, 2020.
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Photo: Marc A. Hermann / MTA New York City Transit
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/61135621@N03">Metropolitan Transportation Authority of the State of New York</a> from United States of America
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/mtaphotos/49890904678/">Social Distancing Guide Markings on Subway Platform</a>