What is the oldest road tunnel in the US?

The Union Canal Tunnel, owned and operated by the Lebanon County Historical Society, is the oldest existing transportation tunnel in the United States. From 1827 to 1885 the Union Canal linked the commercial centers of Harrisburg, Reading, and by extension, the port of Philadelphia.



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The Twin Bores 15, 1968, and was completed five years later on Mar. 8, 1973. The Eisenhower Tunnel celebrates a big milestone of Connecting Colorado for 50 Years as of March 8, 2023. This bore was originally called the Straight Creek Tunnel, and later was officially named the Eisenhower Memorial Bore.

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The first tunnel built whose engineer is known was excavated in the island of Samos. The engineer Eupalinos de Megara, built this tunnel in the 530 b.C to supply with water the capital of the island and was, with its 1 km length, considered as one of the three marvels of the helenic world.

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Norwegian road infrastructure operator Statens Vegvegsen has officially opened world's deepest subsea tunnel, the 14.4km Ryfylke tunnel near Stavanger. The tunnel reaches a maximum depth of 292m below sea level. It is part of the Ryfast road project to link national highway 13 between Stavanger with Strand in Rogaland.

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Both the cavernous subway tunnel underneath Boston's City Hall Plaza and the abandoned trolley passages below Washington, D.C.'s Dupont Circle were decommisioned in the 1960s. Los Angeles also has its own extensive network of abandoned tunnels, including its first subway, the Red Line downtown.

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The Michigan Central Railway Tunnel is a railroad tunnel under the Detroit River connecting Detroit, Michigan, in the United States with Windsor, Ontario, in Canada. The U.S. entrance is south of Porter and Vermont streets near Rosa Parks Boulevard.

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The Howard Tunnel is located near Seven Valleys, Pennsylvania. In operation since 1838, it is the second oldest active rail tunnel in the U.S. Originally constructed by the York and Maryland Line Rail Road, it formed a critical link in the north-south line assembled by the Northern Central Railway.

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It's the lone tunnel that goes underwater in Virginia, although there are several other bridge tunnels in the state. And while you won't be able to ogle marine life from your car window on your drive... rest assured you are indeed well below the surface!

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The Catacombs in New York have been a silent witness to more than 200 years of the city's history. If you are in New York, you should dedicate a few hours of your time to visit them. The Catacombs in New York are located underground, in the former St. Patrick's Basilica.

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Cappadocia city, located in central Turkey, is home to no less than 36 underground cities, and at a depth of approx. 85 m, Derinkuyu is the deepest.

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Norwegian road infrastructure operator Statens Vegvegsen has officially opened world's deepest subsea tunnel, the 14.4km Ryfylke tunnel near Stavanger. The tunnel reaches a maximum depth of 292m below sea level.

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Today the Lincoln Tunnel is the busiest vehicular tunnel in the world, carrying some 120,000 vehicles each and everyday. The three-tubes of the Lincoln Tunnel help to connect midtown Manhattan with three different New Jersey expressways including the NJ 495 Freeway, the NJ 3 and the New Jersey Turnpike.

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Although it passes just offshore of Governors Island, the tunnel does not provide vehicular access to the island. With a length of 9,117 feet (2,779 m), it is the longest continuous underwater vehicular tunnel in North America. Plans for the Brooklyn–Battery Tunnel date back to the 1920s.

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