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The Hampton Roads Bridge–Tunnel ( HRBT) is a 3.5-mile-long (5.6 km) Hampton Roads crossing for Interstate 64 (I-64) and US Route 60 (US 60). It is a four-lane facility comprising bridges, trestles, artificial islands, and tunnels under the main shipping channels for Hampton Roads harbor in the southeastern portion of Virginia in the United States .
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 covered over. Bored tunnel, constructed in situ, without removing the ground above. They are usually of circular or horseshoe cross-section.
The tunnel will consist of 79 standard elements with a length of 217 metres in a design similar to the Drogden trench, with two road tubes, one emergency tube and two rail tubes. Additionally, there will be 10 service elements with a length of 85.7 metres but both wider and higher with a subfloor (basement) to house technical equipment.
World’s longest road and rail tunnel is being built under the Baltic Sea. Descending up to 40 meters beneath the Baltic Sea, the world’s longest immersed tunnel will link Denmark and Germany ...
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 or aqueducts to supply water for consumption or for hydroelectric stations.
This page presents a list of the longest road tunnels of the world. This page lists all road tunnels longer than 5 km (3 mi).
Highway engineering (also known as roadway engineering and street engineering) is a professional engineering discipline branching from the civil engineering subdiscipline of transportation engineering that involves the planning, design, construction, operation, and maintenance of roads, highways, streets, bridges, and tunnels to ensure safe and ...
Standards for Interstate Highways in the United States are defined by the American Association of State Highway and Transportation Officials (AASHTO) in the publication A Policy on Design Standards: Interstate System. For a certain highway to be considered an Interstate Highway, it must meet these construction requirements or obtain a waiver ...