Question

Which type of roads can be constructed under the ground?
a. Flyover
b. Expressways
c. Subways
d. Highways

Answer 1

Hint:
In India, the expressways are controlled-access highways where the entry and exit are controlled by the use of ramps which are built into the architecture of the expressway, whereas the national highways are in the form of highways. Expressways are the largest road class in India.


Complete solution:

Subways:

- The subway is a metro line that is built completely underground.
- The first was the London Underground, which opened in 1863, and several cities followed suit as they learned how useful such a rail line could be.
- Since subways are of a different class than general traffic, they can run fully independently, free of traffic and other issues on the surface of the streets.

Flyover can refer to the following:

- Overpass, a high-level road bridge that spans the junction or intersection of a highway;
- Flypast or flyby, a celebratory or symbolic ride, a ceremonial or honorary flight by one or more aircraft; Flyover reconnaissance, close-up aircraft recognition;

Expressways:

- Expressways are high-speed routes that are four or more lanes that are controlled by access where the entry and exit are controlled by the use of ramps that are built into the configuration of the expressway.
- Any of the current highways in India are toll roads.
- The expressways make up roughly 1,583 km (984 mi) of the Indian road network as of 2013.
- The Government has set a goal for the development of a new expressway network of 18,637 kilometres (11,580 mi) by 2022.


Hence, the correct answer is option C.

Note:
Large highways are also designated and numbered by jurisdictions who generally establish and operate them.
Australia's Highway 1 is the longest national highway in the world at a stretch of over 14,500 kilometres (9,000 mi) and stretches nearly all the way across the continent.
China has the largest network of highways in the world followed closely by the United States of America.