INDIAN GEOGRAPHY

Detailed explanation-1: -The National Highways Authority of India was established by the National Highways Authority of India Act, 1988. Section 16(1) of the Act states that the function of NHAI is to develop, maintain, and manage the National Highways and any other highways vested in, or entrusted to, it by the Government of India.

Detailed explanation-2: -National highways are highways connecting major cities throughout the country with premium quality and are at-grade roads. National Highways are designated with NH, followed by the highway number. Indian national highways are further classified based on the width of the carriageway of the highway.

Detailed explanation-3: -Thus, the correct answer is Option D) National Highways.

Detailed explanation-4: -Road. Complete answer: National highways are A-grade highways that connect the capitals, major cities, ports, and critical locations of many states. Despite the fact that national roads account for only 2% of total road length, they transport approximately 1/3 of all traffic.

Detailed explanation-5: -National Highways Authority of India (NHAI) was constituted by an Act of Parliament in 1988 under the administrative control of the Ministry of Road Transport and Highways NHAI has been set up as a Central Authority to develop, maintain and manage the National Highways entrusted to it by the Government of India.