Todd Heisler/The New York Times

Thanks to the Arts for Transit program, there are moments of genuine delight to be found in the New York City subway. There are also delightful surprises that have nothing to do with artistic intent.

Or spelling ability.

Take, for instance, the “Brodaway” mosaic sign at a station on the G line in Brooklyn. The typo was cemented into place almost 75 years ago and is well known to admirers of such anomalies. (“ NYC Transit’s Top Typos!” on Gothamist; “Broadway (IND Crosstown),” on nycsubway9.org; and “Vernon Jackson Ave” on Flickr; among many, many others.)

When Gothamist noticed the error in 2009, the Metropolitan Transportation Authority promised that it was “going to look into it.” The agency has since thought better.

“We’re not correcting it,” Deirdre Parker, a spokeswoman for the transportation authority, said Thursday.

“It’s going to be there forever,” Ms. Parker added. “It’s iconic.”

And always available to delight another traveler for the first time.

Full disclosure from a glass house: I made several errors in an article last week about the Fulton Street Transit Center. Happily, I wasn’t working in mosaic tile.