East Side Access is a public works project in New York City that will extend the Long Island Rail Road (LIRR) from its Main Line in Queens into a new station under Grand Central Terminal on Manhattan's East Side. A project of the Metropolitan Transportation Authority (MTA), the new station and tunnels are tentatively scheduled to start service in December 2022, some 15 years behind schedule. The project's estimated construction cost has risen nearly threefold from the planned $3.5 billion to $11.1 billion , making it one of the world's most expensive underground rail-construction projects.