The Holland Tunnel is a vehicular tunnel under the Hudson River. It connects Lower Manhattan in New York City to the east with Jersey City in New Jersey to the west. An integral conduit within the New York metropolitan area, the Holland Tunnel is operated by the Port Authority of New York and New Jersey (PANYNJ).
The tunnel carries Interstate 78; the New Jersey side is also designated the eastern terminus of Route 139. The Holland Tunnel is one of three vehicular crossings between Manhattan and New Jersey, the others being the Lincoln Tunnel and the George Washington Bridge.
Construction of the Holland Tunnel started in 1920, and it opened in 1927. At the time of its opening, the Holland Tunnel was the longest continuous underwater vehicular tunnel in the world.
The Holland Tunnel was the world's first mechanically ventilated tunnel; the ventilation system was designed by Ole Singstad, who oversaw the tunnel's completion.
According to en.wikipedia