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The Holland Tunnel, the first undersea passage for vehicles, has a ventilation system that replaces all air inside with clean air in 90 seconds. It connects NYC and Jersey City and is the second-longest underwater crossing in North America.
The Holland Tunnel, which was the first undersea passage for vehicles, features a ventilation system that blows fresh air through ducts into the roadway while exhaust ducts above the roadway remove fumes. It was built from 1920 to 1927 under the Hudson River to connect New York City and Jersey City, New Jersey. The Holland Tunnel’s ventilation system of 84 fans allows all the air inside the tunnel to be completely replaced with clean air within 90 seconds. Until this ventilation system was devised, underwater vehicular crossings were too dangerous to make due to the buildup of carbon monoxide.
More information on the Holland Tunnel:
During construction of the tunnel, Chief Engineer Clifford Holland is said to have suffered a nervous breakdown due to the stress and work involved in the project. He was hospitalized until his death in 1924, three years before the tunnel’s completion.
At 8,558 feet (2,608.5 m) over its westbound tube, the Holland Tunnel is the second-longest underwater crossing for vehicles in North America, behind New York’s Brooklyn-Battery Tunnel, which is 9,117 feet (2,799 m) long .
In 2012, more than 16 million vehicles passed through the New York-bound tube of the Holland Tunnel.
