The Holland Tunnel is a vehicular tunnel under the Hudson River that connects Hudson Square and Lower Manhattan in New York City in the east to Jersey City, New Jersey in the west. The tunnel is operated by the Port Authority of New York and New Jersey and carries Interstate 78. The New Jersey side of the tunnel is the eastern terminus of NJ Route 139. The Holland Tunnel is one of three vehicular crossings between Manhattan and New Jersey; the two others are the Lincoln Tunnel and George Washington Bridge.
Plans for a fixed vehicular crossing over the Hudson River were first devised in 1906. However, disagreements prolonged the planning process until 1919, when it was decided to build a tunnel under the river. Construction of the Holland Tunnel started in 1920, and it opened in 1927. At the time of its opening, it was the longest continuous underwater tunnel for vehicular traffic in the world.
The Holland Tunnel was the world's first mechanically ventilated tunnel. Its ventilation system was designed by Ole Singstad, who oversaw the tunnel's completion. Original names considered for the tunnel included Hudson River Vehicular Tunnel and Canal Street Tunnel, but it was ultimately named the Holland Tunnel in memory of Clifford Milburn Holland, its initial chief engineer who died suddenly in 1924 prior to the tunnel's opening.
The Holland Tunnel is operated by the Port Authority of New York and New Jersey. It consists of a pair of tubes with diameters, running roughly parallel to each other and apart underneath the Hudson River. The exteriors of each tube are composed of a series of cast iron rings, each of which comprises 14 curved steel pieces that are each long. The steel rings are covered by a layer of concrete.
Each tube provides a roadway with two lanes and of vertical clearance. The north tube is between portals, while the south tube is slightly shorter, at . If each tube's immediate approach roads are included, the north tube is long and the south tube long.
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The Lincoln Tunnel is an approximately tunnel under the Hudson River, connecting Weehawken, New Jersey, to the west with Midtown Manhattan in New York City to the east. It carries New Jersey Route 495 on the New Jersey side and unsigned New York State Route 495 on the New York side. It was designed by Ole Singstad and named after Abraham Lincoln. The tunnel consists of three vehicular tubes of varying lengths, with two traffic lanes in each tube.
The Holland Tunnel is a vehicular tunnel under the Hudson River that connects Hudson Square and Lower Manhattan in New York City in the east to Jersey City, New Jersey in the west. The tunnel is operated by the Port Authority of New York and New Jersey and carries Interstate 78. The New Jersey side of the tunnel is the eastern terminus of NJ Route 139. The Holland Tunnel is one of three vehicular crossings between Manhattan and New Jersey; the two others are the Lincoln Tunnel and George Washington Bridge.
The New York metropolitan area, broadly referred to as the Tri-State area, is the largest metropolitan area in the world by urban landmass, encompassing . The New York metropolitan area is one of the most populous metropolitan areas in the world, the world's largest metropolitan area by size, and the only U.S. metropolitan area larger than 20 million residents as of the 2020 United States census.