A stairway leads down to the train platforms for Tracks 11 and 13 at Penn Station in Manhattan. A sign reading “Watch Your Step” hangs above the stairs, while a black-and-white advertisement looms over the tracks in the busy transit hub.

A Metro-North Railroad train sits at a platform inside Grand Central Terminal in Manhattan. The stainless-steel cars reflect the dim lighting of the underground station, where exposed pipes and graffiti-marked beams highlight the aging infrastructure of the busy commuter hub.

A Connecticut state seal is displayed on the side of a Metro-North Railroad train car, operated in partnership with the Connecticut Department of Transportation. The red-and-silver exterior includes safety instructions and signage, highlighting the regional rail system that connects commuters between New York and Connecticut.

A Metro-North Railroad train is seen at a station platform, its blue-and-white exterior bearing the MTA logo. The commuter rail line, operated by the Metropolitan Transportation Authority, connects New York City with suburbs across New York State and Connecticut.

A Metro-North Railroad train waits at a platform inside Grand Central Terminal in Manhattan. The concrete pillars and exposed beams of the underground station frame the tracks, where the yellow warning strip lines the edge of the platform.

The entrance to Track 30 inside Grand Central Terminal in Manhattan is seen at night. The marble hallways of the landmark station lead to the train platforms below, as a commuter and a security officer stand near the archways beneath illuminated signs.

An eagle statue perched on a globe stands outside Grand Central Terminal in Manhattan. The bronze sculpture, one of several around the historic landmark, looks out over Midtown with the glass facade of the MetLife Building rising in the background.