The Metropolitan Transportation Authority is North America's largest transportation network, serving a population of 15.2 million people in the 5,000-square-mile area fanning out from New York City through Long Island, southeastern New York State, and Connecticut. Metro-North Railroad is second largest commuter railroad in the nation. Its main lines — the Hudson, Harlem, and New Haven — run northward out of Grand Central Terminal, a Beaux-Arts Manhattan landmark, into suburban New York and Connecticut. Grand Central has been completely restored and redeveloped as a retail hub — a destination in its own right.