New York City's newest subway station—its 469th!—opened for business Sunday afternoon, as the 7 line extension at 34 St–Hudson Yards welcomed its first, long overdue riders. Crowds ran to be among the first to take a train from the station, which is the new terminus of 7 line. "This is really a monumental day for this city," said Mayor Bill de Blasio of the first far West Side station's opening. "We believe this city can, and will, and must grow." The MTA predicts that this will be the busiest single-line station in the system.