Transportation in New York City City and Fort Lee, New Jersey, is the world's busiest bridge in terms of vehicular traffic. New York has historically been a pioneer in tunnel construction. Most carry rail lines, but there are four exceptions. The Lincoln Tunnel, which carries 120,000 vehicles per day under the Hudson River between New Jersey and Manhattan, is the world's busiest vehicular tunnel. The Holland Tunnel, also under the Hudson River, was the first mechanically ventilated vehicular tunnel in the world and is considered a National Civil Engineering Landmark by the American Society of Civil Engineers. Two other notable tunnels connect Manhattan to other
Pennsylvania Station (New York City) the four East River Tunnels, and the single Empire Connection tunnel). It is at the center of the Northeast Corridor, a passenger rail line that connects New York City with Boston, Philadelphia, Washington, D.C., and intermediate points. Intercity trains are operated by Amtrak, which owns the station, while commuter rail services are operated by the Long Island Rail Road (LIRR) and New Jersey Transit. Connections are available within the complex to the New York City Subway, and buses. The old "Hilton Corridor" formerly provided indoor connection with the 34th Street–Herald Square subway station and 33rd Street PATH station. Penn Station