[2] A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. The central portions of a rapid transit network are usually in the tunnel. Some tunnels are used as sewers …

The meaning of TUNNEL is a covered passageway; specifically : a horizontal passageway through or under an obstruction. How to use tunnel in a sentence.

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 …

tunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature’s action in dissolving a soluble rock, such as limestone. A …

TUNNEL definition: 1. a long passage under or through the ground, especially one made by people: 2. the long passage…. Learn more.

Tunnel construction is a subset of underground construction. There are three basic types of tunnel construction in common use: Cut-and-cover tunnel, constructed in a shallow trench and then …

Jun 19, 2025 · The uncompleted tunnel extended more than 1,000 feet inside the U.S. and was highly sophisticated. In early April, Border Patrol agents assigned to the San Diego Sector …

A tunnel is a man-made underground passageway that is dug through soil, rock, or other materials, and is typically used for transportation purposes. It is enclosed on all sides, except …

Tunnel definition: A passage through or under a barrier such as a mountain.

Tunnels are the structure constructed for the conveyance of flow or for transportation purposes or to store food or radioactive. Usually in hydro-technical practice, tunnels are used for the …