The No. 9 train long ago left the station for the last time, but this sign for the lost line has 9 lives

The No. 9 subway line did not have nine lives. The line served Manhattan’s West Side, and offered uptown skip-stop service along the No. 1’s route.

The No. 9 was retired in 2005 after a 16-year roll, leaving the No. 1 alone to run from South Ferry to 242nd Street in the Bronx.

But on this easy-to-miss tiny sign, the No. 9 train is alive and well. This sig…