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Tunnel - Wikipedia A tunnel is an underground or undersea passageway It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for the two portals common at each end, though there may be access and ventilation openings at various points along the length
TUNNEL Definition Meaning - Merriam-Webster The meaning of TUNNEL is a covered passageway; specifically : a horizontal passageway through or under an obstruction How to use tunnel in a sentence
How Tunnels Work - HowStuffWorks In this article, we'll explore what makes tunnels such an attractive solution for railways, roadways, public utilities and telecommunications We'll look at the defining characteristics of tunnels and examine how tunnels are built
Irvine-Corona Expressway - Orange County Transportation Authority Based on the limited studies conducted to date, it is determined that a tunnel system is technically feasible While there are no fatal flaws identified that would prevent the project from being designed, constructed and operated, there are however, significant challenges
Tunnel - definition of tunnel by The Free Dictionary Define tunnel tunnel synonyms, tunnel pronunciation, tunnel translation, English dictionary definition of tunnel n 1 An underground or underwater passage 2 A passage through or under a barrier such as a mountain 3 A tube-shaped structure v tun·neled ,
Tunnel - New World Encyclopedia In general, tunnels are at least twice as long as they are wide and are completely enclosed on all sides, save for the openings at each end A tunnel may be used by pedestrians, cyclists, motor vehicles, or rail traffic
List of tunnels in the United States - Wikipedia Fort George Tunnel, IRT Broadway–Seventh Avenue Line (1 train), 2 miles of rock tunnel from 157th Street to Dyckman Street, the second-longest two-track tunnel in the country (after the Hoosac Tunnel) when completed in 1906