AI technology in NYC subways aims to improve safety by monitoring behavior patterns, led by MTA's Michael Kemper, while ensuring rider privacy is protected.

A look at the light bulbs in retired turn-of-the-century subway cars showcased at the New York Transit Museum.

Much of the New York subway system still uses signal technology ... its 15 minutes of fame in a 2009 movie about a hijacked subway car, “The Taking of Pelham 123,” a remake of a 1974 film.