Passenger service is a different story. The sole intercity passenger railroad in the continental United States today is Amtrak. Commuter rail systems exist in more than a dozen metropolitan areas, but these systems are not extensively interconnected, so commuter rail cannot be used alone to traverse the country. Commuter systems have been proposed in approximately two dozen other cities, but interplays between various local-government administrative bottlenecks and ripple effects from the 2007–2012 global financial crisis have generally pushed such projects farther and farther into a nebulous future point in time, or have even sometimes mothballed them entirely.
The most culturally notable and physically evident exception to the general lack of significant passenger rail transport in the U.S. has been, and continues to be, the Northeast Corridor, which connects Washington and New York City with Boston and, jutting from those northern points, also other areas of Connecticut and Massachusetts. The corridor handles frequent train service that is both Amtrak and commuter. Meanwhile, New York City itself is noteworthy for high usage of passenger rail transport, meaning not just the New York City Subway system (which counts more as a short-haul metro system despite its fairly extensive network and relatively long lines) but also the Long Island Rail Road, the Metro-North Railroad extending into Connecticut, and links through the New Jersey Transit system to the Philadelphia-based Southeastern Pennsylvania Transportation Authority trains to points as far south as Newark, Delaware. The New York City Subway system is used by one third of all U.S. mass transit users.
