Question

what is a national highway?

Answer 1

The National Highways Authority of India is the nodal agency responsible for building, upgrading and maintaining most of the national highways network. It operates under the Ministry of Road Transport and Highways. 

Answer 2

The national highways network of India is a network of trunk roads that is owned by Ministry of Road Transport and Highways.It is constructed and managed by National Highways Authority of India (NHAI), National Highways and Infrastructure Development Corporation (NHIDCL) and Public Works Department (PWD) of the state governments. NHAI was established by 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. These highways as of June 2017 measure over 115,435 km (71,728 mi).[1] Indian government led by PM Modi has vowed to double the highway length from 96,000 to 2,00,000 km.[