We found a curious thing on the New York Transit Museum Facebook page yesterday, a subway sign for an 11 train! Further digging showed that there are signs on the trains that are available just in case, but aren’t actual lines anymore. According to commenters on the Transit Museum Facebook post, the former BMT line used to have 16 numbers. Many have been converted into the letters you’re familiar with today. Zero is also used internally by the MTA to refer to the 42nd Street Shuttle.
Here’s a recap of some found in the wild!
Photo by Robert Marrero from Wikimedia Commons